Disappearing messages rules apply to any sort of communication you do in a chat, including text, files, photos, location, GIFs and whatever else. But when you delete a reply to a message, the behavior can be a little different than you may expect.

We’ll step you through what to think about when you’re shopping for a dash cam, from video capabilities, recording options, power connections, and more.

Signal can send a link preview when you send a contact a link to a website. This generates a preview image along with the link instead of just showing the text of the URL. This may leak the fact you're sharing on Signal to the website (though the site still wouldn't know anything more than that). These are disabled by default, but if you've enabled them and want to turn them off, you can.

The Vantrue N5 offers the most complete coverage of any dash cam system we’ve ever seen. It comes with 4-channels including a front, rear, and dual cabin cameras (one in the front facing aft and another in the rear facing forwards). All of these cameras allow you to see not only what is happening outside your vehicle, but also within it, and they even catch some blind spots that front/rearview cameras might miss.

Alongside one-on-one chats, Signal also supports group chats and group video calls. Both of these are end-to-end encrypted. Creating a new group works the same on both Android and iOS:

Many people who purchase and install dash cams use them as a type of insurance policy for their actions and those of others on the road. Dash cams can protect you from other drivers in a number of ways. They can help you prove your innocence in the event of an accident. They may also act as a deterrent against aggressive drivers. And some dash cams come with features that have motion-sensor parking modes that can record any possible hit-and-runs or thefts while you are away from your car.

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Signal requires a working phone number to set up. While Signal doesn't use SMS, your phone number is used to verify who you are and limit you to one account. By default, your phone number is not visible in your Signal profile unless someone already has that number in their address book. If you do not want to use your primary phone number, Freedom of the Press Foundation has tips for getting a secondary number.

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Prior to our review of the Cobra SC 400D above, the 622GW front/rear system was our hands-down favorite. And, really, it shares virtually all the same attributes as its rival—nice design and build quality, excellent day and night captures, drive mapping, a wonderful 3-inch display, emergency response to accidents, Alexa support, and the ability to add a third camera for interior views. Like the 400D, it carries a premium price tag. But in the end, you can’t go wrong with either model.

On both Android and iPhone, you also have the option on this screen to limit who can find you by your number. By default, this is set to "Everybody," meaning that anyone who has your phone number in their phone's address book will automatically find you on Signal. If you don't want it to work like this, tap "Who can find me by my number?" and change the setting to "Nobody." Unless you also set up a username, nobody will be able to initiate a chat with you if you set this to "Nobody." Once a username is set up, people will only be able to start a chat with you if they have your username.

In the end, it’s ultimately up to you as to whether you believe the possible benefits of buying and using a dash cam are worth the investment.

Signal can check your contacts list to see who is using Signal. To do this, Signal uses a private contact discovery system. The data uploaded to Signal is immediately deleted after your contacts are matched up. If sharing your contacts with Signal is a concern, you can deny the contacts permission. If you don’t allow this permission, you can still use Signal, but you have to manually enter phone numbers to begin chatting with people. You can change this in the future, but for now, choose to allow or deny access:

You will see a string of 60 numbers and a QR code. Match the color cards with the person you're verifying with, and then you can either verify by manually reading off these numbers to make sure they correspond with your contact's numbers, or if you're in the same location, you can scan the QR code that appears on this screen. If needed, you can also copy the numbers and share it over a secondary secure channel. Once verified, tap the "Mark as verified" button.

You can also set the permissions of the group chat to restrict people from renaming the group or adding new members. Tap the group chat name, then "Permissions" and change the settings however you prefer.

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The camera’s body is tastefully styled, measure a mere 1.3 inches wide by 1.18 inches thick by approximately 2.85 inches tall, with a front lens that sits flush with the body. The unit easily slides in and out of a mount that affixes to your car with semi-permanent adhesive.

By default, you will see certain content in Signal when you open the app switcher. For example, if you switch back and forth between apps while chatting with someone, the app switcher will show the contents of those messages. The main concern here would be if someone happens to look over your shoulder when you switch apps and get a glimpse at your private chats. You can set up Signal so it blocks this view:

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For even more information on what to look for when buying a dash cam, scroll to our buyer’s guide under our best picks. And after you’ve bought a dash cam, save yourself some time and frustration by reading our guide on how to install a dash cam.

When you create a new story, you will always get the above options to choose who can view it. You will also get the option to restrict it to only a specific group chat.

In order to use Signal, the person you are contacting must have Signal installed. But otherwise, using Signal works essentially the same as other chat and phone apps you've used. Alongside text, you can send stickers, photos, voice memos, GIFs, files, and more. All of these are also end-to-end encrypted.

Enabling "Registration Lock" prevents your phone number from being registered on a different device without the PIN you set up when you first installed Signal. Make sure you write this PIN down, because without it, you will not be able to get back into your Signal account for at least seven days if you change phones.

Signal has a feature called "disappearing messages" which ensures that messages will be removed from your device and the device of your contact(s) in a chat a chosen amount of time after the messages are seen (the countdown starts when the recipient opens the message, not after you send it). While it's a handy feature, remember that those you are chatting with can log or take screenshots of your conversation, even if you’ve enabled disappearing messages. You can set up a default time period for disappearing messages for every new chat you create:

Yes, in all U.S. states, dash cams are legal. However, it’s best to check with your particular state’s traffic laws to determine what type of dash cam you should use. For example, not all states allow a dash cam to be mounted to a windshield—it’s best to do a little research before you buy.

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It only sweetens the deal that the VS1 Mini 2K also offers a GPS, along with voice commands and a phone-app interface, since the small size leaves no room for an on-unit display.

If you’re in the market for an unobtrusive, front-only cam that’s capable of capturing good-quality (1440p) day and night images, then the Viofo VS1 Mini 2K should be on your radar.

Not only do the front and rear view cameras offer solid resolutions, but the interior cam is discreet and all are easy to install. The Viofo A229 Plus also comes with an onboard mic for recording audio or receiving voice commands — an extremely convenient feature while driving. The A229 comes with GPS tagging, motion detection, and a parking mode as well. Needless to say, it’s chock-full of amenities and features. A 3-channel dash cam might not be for everyone, but if you need one, the Viofo A229 should be at the top of your list.

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A dash cam is all about monitoring and recording your surroundings, and for that it’s hard to beat a 3-channel system. Combining front view, interior view, and rear view, a 3-channel dash cam makes sure nothing is missed. The Viofo A229 Plus is our pick for best 3-channel system due to strong 1440p front and rear captures, 1080p interior captures, and a whole host of great additional features.

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Dash cams are all about capturing the action, and few do it better than the front/interior Cobra SC 201. The exterior night video, especially, is unsurpassed in its ability to show details in dark surroundings and it offers a laundry list of features including GPS and cloud uploads. The company even includes a 16GB SD card. It’s well worth the money for what you get—just don’t try to use the cloud functionality with an older phone OS.

Note that the one thing I can’t relate to you is the longevity of any dash cam, as my testing occurs over a relatively short amount of time. Please check user reviews on various sites and pay attention to the warranty.

Signal's default setup is relatively secure, but there are a few things to consider changing, and some features you may want to tinker with.

For every dash cam, I mount it in my car, judging the ease and convenience of doing so. Tip: Many dash cams rely on adhesive for mounting to your windshield. Hot conditions can make it next to impossible to remove the film that protects the adhesive. Remove the film in a cool environment, or place it in the fridge for a minute or two before installing it.

Some phones give you an option for custom keyboards, but a custom keyboard can leak information to third-parties. On Android, you have the option for an "Incognito keyboard" in Signal that can prevent some keyboards from collecting data, though it is not a guarantee to protect you from a malicious keyboard.

Our review of the Cobra SC 400D left us smitten. It’s pricey, yes, but it delivers the goods with stunning images—4K for the front, 1080p in the rear—day or night. In addition to that it has all the trappings of a premium product: a sturdy magnetic mount with integrated GPS, a crisp 3-inch touchscreen display, and Alexa support for finding businesses and the like when you are on the road. It can also be expanded with an optional 120-degree FOV cam for the interior.

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Signal's Stories feature works similarly to Instagram or Snapchat, where a photo or video exists in the app for a set amount of time. Like a social network, you can control who can see these stories:

By default, when you view a story, the person who created that story may be able to see that you viewed it. If you don't like the idea of others knowing when you've viewed their stories, you can hide that information. When you do, it will also make it so you cannot see who has viewed your stories:

I try all the features: Buttons, display controls, apps. Aside from rear-view support and GPS, the most salient differences between the products are the interface controls and extra features, such as the lane departure and collision warnings that you get with some models. I try them…and I turn them off. In practice, they usually tell me I’m changing lanes, in heavy traffic, or have just been cut off. I know that. Additionally, the collision warnings generally come too late to do anything but distract you at exactly the wrong time.

Dash cams use removable SD or microSD cards to store recorded data. Unlike your phone or mobile device, which stops you from adding more pictures or videos when the memory is full, a dash cam instead just uses an overwrite function to record over old data. Therefore, you shouldn’t have to worry about your dash cam shutting off because the memory card is full.

If you previously allowed Signal access to your contacts, you will see a list of all the registered Signal users in your contacts. Pick the person you want to message, or type in a phone number. From this screen, you can start chatting, or initiate a phone (or video) call. If you're using Signal on Android, you can initiate calls from the call tab, as well.

We believe that the sweet spot for a memory card is somewhere around 128GB. Even if you are recording in 4K, this will allow you to record continuously for around five hours, or around 20 hours if you record at 1080p. Thankfully though, memory cards are relatively cheap and you won’t need to break the bank if you opt for even more storage capacity.

All in all, the VS1 Mini 2K has a clear edge over our previous favorite small dash-cam wonder, the Garmin Dash Cam Mini 2.

This is also a good time to audit any keyboard you've installed in the past and perhaps forgotten about. If you do not need them, use them, or know enough about the keyboard app to feel comfortable using it, it's best to remove it:

Since Signal treats your phone number like a username, you may need to change it if you get a new number, or if you decide that you want to get a secondary number for communication. You can change your number easily:

Next up is creating a profile and a PIN. The profile image and name you choose will be shown to any contacts you have saved in your address book, when you initiate or accept new chats, and when you join new groups. While a first name (either genuine or made up) is required, the image and last name are optional. A PIN keeps your information safe on Signal’s servers, and if you switch phones you will be able to recover your settings, profile, and contacts using it.

The market today is now saturated with 4K-front/1080p-rear camera setups, but the 70mai 4K A810 stands out from the rest. It’s absolutely loaded with great features such as onboard GPS, Wi-Fi, and Bluetooth for phone connectivity. The 3-inch IPS display provides a colorful and crisp image and it can be powered either via USB Type-A or Type-C cables. It also gives you advanced features like lane-departure and forward-collision warnings.

Something most people don’t consider before they buy is that dash cams connect to a power source in your car via a physical cable. That cable can sometimes be tucked out of the way, but more likely than not you’ll have loose cable hanging somewhere. You can sometimes fix this with a longer or shorter cable (or a professional installation). Keep that in mind as you consider your power options:

The N5 offers much more than just thorough coverage. It comes with watermarked GPS on board and excellent capture quality—the front cameras is capable of 1440p with superb night captures as well. You can also control the system via voice control and it offers great connectivity features as well. Overall, there is no other dash cam on the market that does a better job of capturing events in and around your car.

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Another feature that’s becoming more common in dash cams is a low-voltage cutoff as a safeguard against dead batteries. This feature automatically shuts-down your dash cam if it senses that the power drops below a certain threshold. So you can rest assured knowing that your dash cam won’t kill your car battery.

As with most chat apps, communications can be made between either individuals or a group, allowing you to send end-to-end encrypted text, picture, audio and video messages, as well as live video and audio calls. Everyone must have the Signal app installed to communicate with each other. Encrypted calls and messages use your data connection, so both parties in the conversation must have internet access on their mobile devices. Due to this, you will not incur SMS and MMS fees when using Signal.

If the connection to the proxy is successful, you'll see a status message telling you that it works. When using a proxy server, your messages are still end-to-end encrypted, though the proxy provider can see your IP address .

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While you drive, there’s a lot happening, so a second pair of eyes can help you stay safe. A dash cam provides this extra vigilance and helps give you peace of mind while out on the road. The best dash cams monitor in high-res video what’s happening while you’re behind the wheel, with timestamps and GPS coordinates. They can even record while your car is parked, helping you keep tabs on your car while you’re away.

That being said, if you want to ensure that you aren’t overwriting valuable old data, you’ll want to get an adequate-sized memory card, and consider the resolution at which the camera captures the video. 4K recordings take up a lot more space than 1080p recordings.

After an introductory screen with information about the Terms and Privacy Policy, you will see a dialogue explaining why Signal requests the “Contacts” permission on your phone.

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If you're in a circumstance where you're calling someone you don't trust (or they're calling you), consider changing how Signal routes your call. By default, Signal uses peer-to-peer calling, which can leak your IP address to the other caller. If that caller is not in your contacts list, Signal defaults to an option that relays the call through their service, hiding your IP address. But you can also enable this for every call, if needed. But note that the increase in privacy comes at the cost of call clarity.

The use of dash cams in consumer vehicles is a relatively recent trend, and people have been driving just fine without them for a long time. However, while it might not be necessary, there are legitimate benefits to using a dash cam in your car.

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You can also optionally create a username to share with others instead of your phone number. We'll get into setting this up below.

If you have no interest in the Stories feature, you can disable Stories entirely. Doing so makes it so you cannot view other's stories, and removes the "Stories" tab from the app's main screen:

When you want to share your username with someone, you can tap [profile picture in the top left] > [box with your name at the top of the screen] > QR Code or Link to share a link or a QR code.

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Once you've started a message thread, you can consider verifying the authenticity of the person you are talking with to make sure their encryption key wasn't tampered with (a process called key verification ). This may not be necessary for everyone you communicate with, but can be useful in cases where you're talking about private information. The process works the same on both Android and iPhone:

On the next screen, you're asked to create a name for your group, select a duration of time for disappearing messages (more on these below), and then tap "Create." As long as you added at least one person to the group chat, you'll go to the main chat screen.

If you really want to save money, this Walmart-exclusive Nextbase 222X front-and-rear camera duo offers great value. The 1080p/720p video is a compromise, but video quality is still good, it has a nice magnetic mount, a clear 2.5-inch screen, and a battery-supported parking mode.

If you use biometrics (like your fingerprint or face) or a PIN to lock your phone, you can also lock down the entire Signal app. This means after unlocking your phone, you'll need to authenticate again to open the app or access chats. To lock the whole app:

All of that plus the A810 captures crystal-clear 4K images with the front camera and 1080p with the rear camera. Most other competitors don’t offer nearly the same features or image quality for the price either. For these reasons, the 70mai 4K A810 is an absolute midrange bargain among dual-channel dash cams.

Few people are as well situated geographically as I am to test dash cams. Within two blocks there are major four- and six-lane thoroughfares, numerous bike lanes, joggers, dog walkers, oblivious ear-budded pedestrians, and a major bus nexus serving both public and private coaches. The opportunities for near-accidents are endless.

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Signal is a free and open-source application for Android, iOS, and desktop that employs end-to-end encryption to keep communications safe. Signal has certified to courts that it only maintains two types of user data available to law enforcement: timestamps of when each account was created and the date that each account last connected to the Signal service.

"Who Can See My Number," controls whether or not your phone number is visible to people (or groups) you message. For example, if set to "Everybody," when you're in a chat with someone, even if you previously only exchanged usernames, they can see your phone number. This is set to "Nobody" by default.

If you cannot access Signal because the service is blocked in your region, you can try using a proxy server. When you connect to a proxy server, you connect to a server set up by volunteers, not Signal, which in some situations can help you use Signal in places where it's blocked. Accessing Signal over a proxy server is straightforward, but in order to find a reliable one you will need to search online. It is usually best to search on social media for proxy details when you're in need of one. To use a proxy server:

Now, when you send the photo or video, the recipient can only view that content one time, but keep in mind they can still take a screenshot of it.

Despite the name, Signal's usernames don't work like you may be used to on social media accounts, nor do they work exactly like a phone number. Think of your username more like a "discovery handle." It's a way for people to easily find you, and you can change it as often as you like. By default, after you set up a username, anyone you chat with will not be able to see your phone number unless they already have your number in their phone's address book.

If you enable the share link and change your mind, you can always delete the link, or reset it. This is helpful if the link was shared by someone you don't want in the group. Tap the group chat name, then "Group Link" to change these settings.

You can change your username anytime you want without losing the chats and contacts you have already started, but if someone only has your old username and tries to contact you, they will not find you. Note that if someone who you've blocked changes their username, they will continue to be blocked.

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When choosing the best dash cam for your needs you should first consider if you want a front, front/interior, or front/rear model. Additionally, you’ll want to decide on how wide a viewing angle you’ll need. Then there are special features to take into account, such as voice control or parking assist. Since there are a number of reasons to use a dash cam, we understand that there isn’t a one-size-fits-all model. With that in mind, we’ve curated a list of the best dash cams of all types with various features and prices below.

I put each dash cam through several days’ and nights’ worth of driving, recording video and judging the image quality. All the dash cams I’ve reviewed in the last couple of years take good daytime video. However, night video is often plagued by murky shadows and headlight flare. That said, quality is improving rapidly with the introduction of new sensors. Take a close look at the night shots in each review.

Probably not. And by that, we mean almost certainly not. A standard dash cam with front and rear coverage, motion detection, and Wi-Fi all operating while your car is parked will only consume about 0.25 to 0.45 amps per hour. A typical small or midsize car battery is rated at 45 amp hours. This means that while your car is turned off it will take a few days for your car battery to get low from powering your dash cam.

The Garmin Dash Cam 57 is a small but mighty front dash cam that has it all: great 1440p video with a 140-degree field of view, integrated GPS and driving assistance, good phone connectivity, an easy and convenient magnetic mounting system, and the backing of Garmin’s good name.

"Who Can Find Me By Number," controls whether someone can type your phone number into the search bar to find you, or pull up your phone number through their address book. This is set to "Everybody" by default. If you set it to "Nobody," it makes it so even people who do have your number in their address book will not be able to easily find you on Signal. You will instead have to share your Signal username with them. To change this setting:

You can also change the length of time before a message disappears in each of your chats. The process is the same on both Android and iPhone:

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