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I think there is a big misunderstanding what locked/unlocked means.

All phones that are made are always assigned to a carrier (yes even the ones that say "Factory GSM Unlocked") to prove that just look up the model of the phone and you will see what carrier it was assigned to.

In order for a phone to have service the company has to know that you want service on this phone.

In the past company's like Sprint and Verizon did not work with a sim card they worked with the id of the phone to recognize what kind of phone / what carrier it was assigned to. This is know as CDMA. Yet company's like att/t-mobile did that too but the service was applied by using a sim.

Once LTE came out for what ever reason all company switched to the "Sim technology". There is still one thing that did not change, each carrier has their assigned bands that they have from the FCC that they are allowed to use.

Being that there are standard bands that every one uses (for international or the like) these are included in every phone. So.... All verizon phones will work on att, BUT will only have the bands for slower internet since those are standard bands.

Now verizon's LTE band is NOT a standard nor is their CDMA a standard so an att or a t-mobile phone will NOT be able to accept a Verizon sim.

Now lets go to sprint phones,

All other company's when they had the phones made for them all they do is have it customized for its own use (Read: their own LTE bands). Sprint on the other hand not only did they have them customize it they put a lock in the software blocking all local USA bands (Verizon ATT and Tmobile).

They even go a step farther and they still do the old way of checking the device ID to see if its a sprint phone or not.

Hope this explains a few things feel free to ask any questions.

Att has an easy way to ask for an unlock https://att.com/deviceunlock

How to check a Sprint iPhone (only): You cannot check it with an american sim you must put in a foreign sim. You DO NOT have to backup and restore as sprint sends in the email! Connect to wifi before starting this procedure.

When you put the sim in one of 3 things will happen.
1. It will say no service in the top right corner = Unlocked
2. It will do a soft restart and ask you for your apple id password = Almost unlocked, after putting in the password its unlocked
3. It will do a soft restart and say "Sim not valid" = Phone is locked

If you got number 2. and you dont know the password just put in your old sim and all will return. When you find out the password repeat the steps.

Willmyphonework.net Can check if the phone will work
« Last edited by yakov116 on June 29, 2016, 01:34:42 PM »

Author Topic: cell phone unlocking  (Read 66504 times)

Offline Galitzyaner

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Re: cell phone unlocking
« Reply #135 on: November 04, 2013, 12:19:25 AM »
how can i unlock a T-Mobile HTC Sensation?
FTFY (no free lunch)

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Offline elikay

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Re: cell phone unlocking
« Reply #136 on: November 04, 2013, 02:10:40 AM »
how can i unlock a T-Mobile HTC Sensation for free?
                                                                               thanks
http://forum.xda-developers.com/showthread.php?t=1233513

Offline SrulyP

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Re: cell phone unlocking
« Reply #137 on: December 10, 2013, 05:12:13 PM »

Reply in a soft voice, "sorry but thats classified information".

Has anyone actually done this?

Offline metsguy

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Re: cell phone unlocking
« Reply #138 on: January 04, 2014, 09:59:24 PM »
Any update to this for ATT iPhones?

Offline AnonymousUser

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Re: cell phone unlocking
« Reply #139 on: January 05, 2014, 12:04:42 AM »
Any update to this for ATT iPhones?
Which phone?

Offline ethana

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Re: cell phone unlocking
« Reply #140 on: January 06, 2014, 09:56:29 AM »
Anyone know how to unlock an iphone 4?

Thanks

Offline elikay

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Re: cell phone unlocking
« Reply #141 on: January 06, 2014, 03:03:28 PM »
If you can jailbreak it, it should be easy.

Offline SrulyP

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Re: cell phone unlocking
« Reply #142 on: February 03, 2014, 06:04:00 PM »
Has there been any update on unlocking an iPhone 5 AT&T that is still on contract? Would love to be able to do this...

Offline stevendre

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Re: cell phone unlocking
« Reply #143 on: February 03, 2014, 10:53:59 PM »
Anyway to use a Verizon galaxy s4 in Israel?

Offline Name Changed

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Re: cell phone unlocking
« Reply #144 on: February 03, 2014, 10:57:42 PM »
Anyway to use a Verizon galaxy s4 in Israel?
Comes unlocked

Offline stevendre

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Re: cell phone unlocking
« Reply #145 on: February 03, 2014, 11:00:39 PM »
Yes it does.  But theres no place to add a new apn for data.  So basically its unlocked for voice.   Is there a way to get data working?

Offline notanonymous

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Re: cell phone unlocking
« Reply #146 on: February 04, 2014, 01:49:28 AM »
Yes it does.  But theres no place to add a new apn for data.  So basically its unlocked for voice.   Is there a way to get data working?
##3282#?

Offline elit

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Re: cell phone unlocking
« Reply #147 on: February 19, 2014, 09:20:41 PM »
Whats the current situation with unlocking an att iphone 4s?  I am under contract and not going oversees and don't want to say I am in the army etc....

Offline DovtheBear

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Re: cell phone unlocking
« Reply #148 on: February 24, 2014, 06:55:16 PM »
Is it possible to get a Boost or Virgin Mobile phone to work on Verizon?
How about to work on Sprint?
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Offline cozmohoot

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Re: cell phone unlocking
« Reply #149 on: February 25, 2014, 07:56:05 PM »
Is it possible to get a Boost or Virgin Mobile phone to work on Verizon?
How about to work on Sprint?
definitely possible. U need a flashing specialist