CDMA or with particular carriers. We've compiled below a list of functional dialer codes that you can use on your iPhone, and we've tested almost all of them out, so don't expect to see any fake codes that promise wealth and unlimited power. However, as stated above, some of these codes only work on certain iPhone models or with specific wireless carriers, so your mileage may vary depending on what combination you have. Also, with some of these codes, after you enter the last digit or symbol, it may immediately work its magic. If not, you'll need to hit the green "Call" button. This will show you the Field Test tool, which has data on your SIM card, cellular connections, and more.
A lot of this is useless to us, but it's still fun to look at. However, you can get a better idea of how your reception is by looking at the dBm decibel-milliwatts numbers. In iOS 10 and earlier , using this code would show the dBm in place of signal reception bars, but you have to dig a bit deeper into iOS 11 and above to see these numbers — and it only works on iPhones with Intel wireless radio chips.
For more info on what this means, check out our full guide on the topic below:. This trick does not seem to work on Verizon Wireless, but it does on all other carriers that we've tested. They've mandated that all US carriers give customers the ability to block their information from appearing on caller ID screens. All they will see on their end once the call goes through is "unknown," "private," or some other indicator of the like. They are less likely to pick up for an unknown number, as they get a bad rap for being associated with spammers, but you never know.
T-Mobile also has another code available. This is necessary to make calls to those who block unknown callers, as well as when you actually want someone to know it's you that's calling, and it works for most carriers.
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Again, T-Mobile has an alternative code available. These alerts help make sure the alert system is working correctly as well as prepare you for when a real emergency strikes. By default, these types of test alerts are turned off, so you have to opt in using the dialer code above. That's the only way. There's no option in the Settings interface to do so.
When opted in, you'll hear a loud alarm-like sound, and the alert will specifically mention it's a test so there's no confusing it with real emergency alerts. Each cell phone provider has their own directory assistance service with a live operator, and the dialer code to access each one is , followed by the call button.
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If you need help finding the phone number, address, or basic info for a business, this is a good option if you don't like using other apps on your smartphone to do some digging yourself. You can even get movie showtimes, get driving directions, and more. Directory listings can be sent to you via text message so you don't forget any information.
We suggest using Maps, Yelp, Safari, or other apps to get you what you need instead of forking out hard-earned dollars for it. Another handy three-digit number is Calling this number is free, unlike , and connects you with wireless customer service. For some carriers, it will be an automated phone system which can connect you to wireless customer service. If you're not getting accurate traffic information on Apple Maps , Google Maps , Waze , or SigAlert , or some other app that has live traffic updates, give a call. This is the number that gives local traffic conditions and updates, and it should work on all carriers.
However, carriers have to work with each state to implement this, so there may be a few states that still haven't connected with certain carriers. Normally, in order to check up on how much data you have left on your cellular plan, you'd have to use the provider's own app or widget to get an accurate reading. Some carriers, such as T-Mobile, will even include accurate data usage stats in your Settings app. But there's an easy way to check used data without installing any apps or switching providers. After calling one of the codes listed above, based on what carrier you have, you should either get a verbal readout from a robotic answerer or a text message that states your total usage for the month so far.
Note that Sprint does not have a service for this. There's an easier way to find your phone's unique identifier — all you need is the secret code. Again you're going to want to start in the phone's dialer. You won't need to hit dial or anything, it will just appear — perfect for when you're trying to remove your network lock to deal with an Apple Genius. Related: iPhone 8 release date. You're popular, we get it, there's no need to rub it in our faces. What you can do, though, is make sure that all of your family and friends are able to get hold of you, even if you're already taking a call.
To do this you'll need to activate your iPhone's Call Waiting, and once again, there's a secret shortcut code for this. Tired of being pestered? You can turn Call Waiting off again by dialling Related: iPhone 7 vs Samsung Galaxy S7. Caller ID is great, even if it's ruined the art of the prank call. That and having a bit of anonymity if phoning someone you'd rather not have your number — such as the person you're buying something off on Gumtree or your latest Airbnb host.
It doesn't have to be this way, though. Want to be more selective? Simply enter 31 directly before your desired number and your iPhone will hide your digits only for that call. Related: Samsung Galaxy S8 release date. There are times when you really don't want to answer the phone — the footy's on, it's the Game of Thrones finale, Jim's calling and you really can't deal with his shit right now. Dodging the inevitable distractions doesn't have to mean the awkward situation of declining a call and having the caller know you've snubbed them, though. There's an easier solution: call forwarding.
Activating this will push all incoming calls direct to voicemail without making you feel guilty about your 14th snub of the day. Perfect for when your rammed with work or simply in need of a break.
Just remember to turn it off again done by dialling the same number when you want to receive calls again. Type keyword s to search. Advertisement - Continue Reading Below. More From Features. The Witcher on Netflix: All you need to know.
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