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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 84836 times)

Offline lcm

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Re: cell phone unlocking
« Reply #690 on: October 20, 2020, 12:19:01 AM »
Update:
Confirmed rsim is working!
Congrats!

And,
Oh well, maybe I should have gotten it after all.

Offline myi

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Re: cell phone unlocking
« Reply #691 on: October 20, 2020, 12:31:51 AM »
Update:
Confirmed rsim is working!

Makes you feel like you literally have a chinese chip right in your pocket;)
How much did you pay?
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Re: cell phone unlocking
« Reply #692 on: October 20, 2020, 12:44:44 AM »

Offline myi

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Re: cell phone unlocking
« Reply #693 on: October 20, 2020, 12:45:28 AM »
$8
Not bad. And you can reuse it?

  I'm not familiar with it.
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Offline Yo ssi

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Re: cell phone unlocking
« Reply #694 on: October 20, 2020, 12:57:27 AM »
Not bad. And you can reuse it?

  I'm not familiar with it.
Yes

Offline mrteethcentury21

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Re: cell phone unlocking
« Reply #695 on: October 22, 2020, 09:49:52 AM »
Honestly, I ve learned something new today. I thought that phones you used to buy as unlocked, they werenŽ t assigned to any company. Thanks for sharing the information.

Offline myi

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Re: cell phone unlocking
« Reply #696 on: October 25, 2020, 02:08:33 AM »
Honestly, I ve learned something new today. I thought that phones you used to buy as unlocked, they werenŽ t assigned to any company. Thanks for sharing the information.
So which carrier is factory unlocked phones connected to?
Don't try to be someone else , be who you are because everyone else is taken.

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Re: cell phone unlocking
« Reply #697 on: October 25, 2020, 04:23:09 AM »
So which carrier is factory unlocked phones connected to?
None.

Offline myi

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Re: cell phone unlocking
« Reply #698 on: October 25, 2020, 10:47:55 AM »
None.
It was a question for above!
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Offline lcm

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Re: cell phone unlocking
« Reply #699 on: October 25, 2020, 03:46:23 PM »
So which carrier is factory unlocked phones connected to?
Most of the posts from that guy seem to kind of but not really make sense