Can an ATT phone be used on T-Mobile?

But if you already have an AT&T iPhone and you aren't locked into a contract, you can easily use that phone on T-Mobile's network. The process is simple, but requires a little setup, and for some, sacrifice. Before you jump for joy, beware that using an AT&T iPhone on T-Mobile isn't always a positive experience.
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Can I put my T-Mobile sim card in a AT&T phone?

No, you can't use a T-Mobile sim on ATT. You need to contact T-Mobile for your data slowdown issues. ATT can't help you or rather, ATT can help you if you switch to ATT.
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Can an iPhone from T-Mobile work with AT&T?

Switching Carriers

If you're switching your unlocked T-Mobile phone to AT&T's, you shouldn't have any issues. Both carriers run their networks on GSM technology, so once your phone is unlocked, just pop in your new AT&T SIM card and you'll be up and running.
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How do I switch my iPhone from AT&T to T-Mobile?

Unlock Your AT&T Phone

To do so, you have to submit an unlock request form from their website. You also need to make sure that you're eligible by following AT&T's criteria: Your phone can't have been related to any kind of fraud or theft. You can't have any past-due balances.
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Does AT&T charge to unlock phone?

Unlocking is free, once you phone is paid off in full, and account in good standing.
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UNLOCKING A AT



Does AT&T unlock phones for free?

If you're an AT&T customer, you can unlock your phone using a portal on the AT&T website. To unlock an AT&T phone, make sure you've paid for the device in full, and don't have any unpaid bills. Active military personnel can unlock their AT&T phones without paying for the device in full.
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How long does it take AT&T to unlock a phone?

Good to know:

It usually takes a few minutes to approve your request, but it could take up to 48 hours.
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Is AT&T and T-Mobile the same?

T-Mobile is not on the same network as AT&T. There are three major cell networks in the country. AT&T and T-Mobile are two of these three networks; Verizon is the third. All are totally separate from each other.
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Why does my T-Mobile phone say AT&T?

AT&T and T-Mobile have mutual roaming aggreement that phones from one carrier can roam to the other when the phone can't connect to its home carrier. So, it sounds like you have no AT&T signal in your basement but T-mobile signal is available.
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Can I just switch SIM cards between T-Mobile phones?

Yes. Swapping your service to another device is as simple as taking the SIM out of one device and putting it in the other.
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Can I unlock my phone myself?

How do I unlock my mobile phone? You can make sure your phone actually needs unlocking by inserting a SIM card from another network into your mobile phone. If it's locked, a message will appear on your home screen. The simplest way to unlock your device is to ring your provider and ask for a Network Unlock Code (NUC).
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What is the network unlock code for AT&T?

When you enable SIM lock, your device asks you to enter a PIN code: The default PIN code for an AT&T SIM card is "1111".
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Can my carrier refuse to unlock my phone?

Unlocking your prepaid or fully paid phone

The terms require carriers to unlock a phone paid in full, or a prepaid phone in service for a year, if a subscriber requests it. Cellular providers also have to alert subscribers when their handsets are eligible for an unlock.
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Can I unlock my phone myself for free?

The first and best route is to go to the carrier. If you are eligible to unlock your phone, then it's completely free! The FCC says: "Participating providers may not charge existing or former customers additional fees to unlock a device if it is eligible to be unlocked.
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Can I unlock my ATT phone under contract?

Complete your contract or installment plan (including early termination fees). Pay off an installment plan early and then make another unlock request after 24 hours. If you upgraded your device before the contract or installment plan ended, wait 14 days after the upgrade to unlock your old device.
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What does AT&T Unlocked mean?

With Android, there's a big difference. For example, an AT&T branded Samsung phone can be carrier unlocked and the phone moved to another carrier; however, the phone will not receive updates as it must be connected to the AT&T network to do so.
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What happens if I unlock my ATT phone?

Unlocking your phone has no effect on your ATT service. It will continue to work. Be advised, your request to unlock won't be approved unless you have been using that phone 6 months or more on prepaid.
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Can I use an AT&T phone on Sprint?

Can I use my AT&T phone with another carrier? Yes. But you should know that not every phone carrier uses the same technology and your AT&T phone might not do everything you want it to if you choose an incompatible carrier. Cell phones use either CDMA or GSM technology.
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Is T-Mobile GSM or CDMA?

*The T-Mobile network uses GSM network standards, and it's not a CDMA network.
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How do you unlock a phone to any network for free?

A mobile phone is a wireless handheld device that allows users to make and receive calls. While the earliest generation of mobile phones could only make and receive calls, today's mobile phones do a lot more, accommodating web browsers, games, cameras, video players and navigational systems.
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How do I know if my iPhone is unlocked?

Here's how to tell if your iPhone is unlocked in Settings:
  1. Open the Settings app on the iPhone in question.
  2. Scroll down and tap General.
  3. Tap About.
  4. Scroll to the bottom and look for Carrier Lock. If it says No SIM restrictions, then your iPhone is unlocked and you're free to use any carrier or cell service.
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