iPhone Everything you need to switch carriers


Own a T-Mobile or AT&T iPhone?

Bring Your Own iPhone

There are a range of carriers that operate on the T-Mobile or AT&T GSM networks, giving you plenty of choices for switching. However, you cant switch to Sprint or Verizon as they run on different technology.

iPhone models 4, 4s and 5 from AT&T and T-Mobile are only compatible with AT&T and T-Mobile's GSM network.

iPhone models 5c, 5s, 6, 6+, 6s, 6s+ & SE were designed to support all major network bands and are compatible with all major network providers. No matter GSM or CDMA, Sprint, or Verizon, these iPhone models will work on any carrier. Just make sure the devices are paid for in full and properly unlocked.


Own a Sprint iPhone?

Sprint | Bring Your Own iPhone

Sprint uses CDMA network technology, this is not compatible with AT&T or T-Mobile (GSM). Sprint's CDMA network isn’t compatible with Verizon's CDMA network, in general phones from these networks are only compatible with their own network, meaning switching options can be limited. Its not all bad news though, as long as your device is unlocked and has previously run on the Sprint network you will be able to switch to a carrier operating on Sprint's network (Sprint MVNO). Older Sprint iPhone models 4, 4s and 5 are only compatible with Sprint's CDMA network. 

iPhone models 5c, 5s, 6, 6+, 6s, 6s+, SE from Sprint were designed to support all major network bands and are compatible with all major network providers. This means iPhone model 5c, 5s, 6, 6+, 6s, 6s+, SE will work on any carrier. Simply make sure the devices have been paid in full and SIM unlocked.


Own a Verizon iPhone?

Verizon | Bring Your Own iPhone

Verizon runs on CDMA technology and is not compatible with GSM technology (T-Mobile & AT&T). Verizon's CDMA network isn’t compatible with Sprint's CDMA network. Typically these phones will only operate on their own network. However, as long as your device is unlocked and has previously run on the Verizon network, your iPhone model 4, 4s, and 5 will work on the Verizon network.

iPhone models 5c, 5s, 6, 6+, 6s, 6s+, SE from Verizon were designed to support all major network bands and are compatible with all major network providers. No matter GSM or CDMA, Sprint, AT&T or T-Mobile, the iPhone model 5c, 5s, 6, 6+, 6s, 6s+, SE will work on any carrier. Just make sure the devices have been paid in full and properly unlocked.


Unlocking Your iPhone

Unlocking your phone is a piece of cake, here's what you'll need

Pay off any remaining balances or finance on the device. In order to switch, the phone must first be paid in full or your new carrier can’t accept the phone onto their network. If you have paid for your device in full, then it is ready to be unlocked and ready to switch. Carriers will ‘lock’ devices to their network until the device has been paid off in full.

Once paid in full you can then request an unlock code from your carrier.

Your carrier cannot refuse to give you the unlock code if there are no outstanding payments due. The FCC (Federal Communications Commission) enforces this unlocking law. The law states that any user who has paid their device in full and completed all formal procedures of their service agreement has the legal right to have their device unlocked by the original phone’s carrier.

Requesting an unlock code is easy and its free. As long as you've met the requirements, the carrier will give you the unlock code. When you sign up with a new service provider, simply enter the unlock code to activate your phone on your new carrier.

How to Port Your iPhone Number

Want to keep your phone number, it's easy...and quick

Most important – do not cancel your service with your current carrier before contacting your new provider. You may not be able to port your number if it has already been deactivated. Once the number is deactivated your current carrier may delete or re-allocate that number - so again, don't cancel service until you have contacted your new carrier.

Once you have decided which carrier, plan and cell phone you want to go for, contact your new provider. They will ask for your name, address and customer account number as they appear on your bill. They may also ask for your account password if you have one. This information will allow the new carrier to properly port your cell phone number. Having this information handy can help speed up the process. Generally you can do all of this on-line as part of the activation process.

If you want to keep your device, you may also need to provide your phone’s ESN/IMEI number, which is usually located on the back of your phone or under the battery. This will let the carrier know that your phone is compatible with their service. It will also inform your new carrier that it has been properly unlocked by the phone’s original carrier.

Porting processes for transferring numbers are generally very quick, sometimes only a matter of minutes, it's really no problem these days to port your number.

Switching Checklist

Use our switching checklist and cover all your bases

  1.  Device has been paid
  2. Unlock code requested
  3. Device has then been unlocked
  4. Check phone eligibility with BYO Phone Eligibility
  5. Once you've confirmed compatibility with your new carrier (either on their website or in-store) then you are ready to switch
  6. Choose a plan that best fits your cellular needs
  7. WhistleOut Cell Phone plans
  8. Sign up for a service plan and port your number
  9. Activate your device onto the desired network your'e switching to

Remember - after paying any remaining balance, request an unlock code from your carrier. The unlock code is a carrier’s security tactic to keep the phones on their network until they are paid back. Sprint is the only carrier that requires you to have your phone in service for at least 12 months on top of paying it in full to be able to switch.

Once you sign up with a new service provider, you will then enter the unlock code to activate your phone on the new service.

iPhone List of Compatibility

Easily determine your iphone's compatibility in the table below.


Service Providers iPhone Models Will Work With

Verizon Sprint AT&T T-Mobile
Verizon iPhone SE Y Y Y Y
Verizon iPhone 6s Plus Y Y Y Y
Verizon iPhone 6s Y Y Y Y
Verizon iPhone 6 Plus Y Y Y Y
Verizon iPhone 6 Y Y Y Y
Verizon iPhone 5s Y N N Y
Verizon iPhone 5c Y N N Y
Verizon iPhone 5 Y N N Y
Verizon iPhone 4s Y N N N
Verizon iPhone 4 Y N N N
T-Mobile iPhone SE Y Y Y Y
T-Mobile iPhone 6s Plus Y Y Y Y
T-Mobile iPhone 6s Y Y Y Y
T-Mobile iPhone 6 Plus Y Y Y Y
T-Mobile iPhone 6 Y Y Y Y
T-Mobile iPhone 5s Y N Y Y
T-Mobile iPhone 5c Y N Y Y
T-Mobile iPhone 5 Y N Y Y
T-Mobile iPhone 4s N N Y Y
T-Mobile iPhone 4 N N Y Y
Sprint iPhone SE Y Y Y Y
Sprint iPhone 6s Plus Y Y Y Y
Sprint iPhone 6s Y Y Y Y
Sprint iPhone 6 Plus Y Y Y Y
Sprint iPhone 6 Y Y Y Y
Sprint iPhone 5s N Y N N
Sprint iPhone 5c N Y N N
Sprint iPhone 5 N Y N N
Sprint iPhone 4s N Y N N
Sprint iPhone 4 N Y N N
AT&T iPhone SE Y Y Y Y
AT&T iPhone 6s Plus Y Y Y Y
AT&T iPhone 6s Y Y Y Y
AT&T iPhone 6 Plus Y Y Y Y
AT&T iPhone 6 Y Y Y Y
AT&T iPhone 5s Y N Y Y
AT&T iPhone 5c Y N Y Y
AT&T iPhone 5 Y N YY
AT&T iPhone 4s Y N Y Y
AT&T iPhone 4 Y N Y Y

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