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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 85343 times)

Offline Thingywingy

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Re: cell phone unlocking
« Reply #570 on: March 06, 2018, 10:42:58 PM »
ďAnd have used a locked one on t-mobile in Toronto.ď
Do you mean that you used it roaming while you had t-mobile service or you set it up with a Canadian carrier?
Regarding calling t-mobile, I donít have the phone on a t-mobile account; Iím looking to buy a cheap one on Ebay.
I am sometimes accused of overthinking things. I am still mulling over whether that accusation has merit.

Offline Definitions

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Re: cell phone unlocking
« Reply #571 on: March 07, 2018, 12:23:59 AM »
Helping Canadian friend who wants a Samsung Gravity SGH-T379. They sell in the US as T-Mobile phones. Do you know if I need it to be unlocked to use on a Canadian GSM carrier (Chatr)?
I can't think of any reason why it shouldn't have to be unlocked.

Offline chaimmayer

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Re: cell phone unlocking
« Reply #572 on: June 18, 2018, 11:45:23 AM »
Someone gave me a used iPhone 6..  It seems like it's locked on boost and I want to use it on t mobile.  The only unlock services I saw online were like $80! 
Is there any cheaper way to unlock it?
Thanks

Offline Thingywingy

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Re: cell phone unlocking
« Reply #573 on: July 25, 2018, 06:25:11 PM »
I have an iPhone with Total wireless that's locked. I'm happy to stay with them but want to use it in Israel. Officially they require you have the phone for 12 months to unlock. Any suggestions?
I am sometimes accused of overthinking things. I am still mulling over whether that accusation has merit.

Offline Thingywingy

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Re: cell phone unlocking
« Reply #574 on: July 26, 2018, 07:14:46 PM »
I have an iPhone with Total wireless that's locked. I'm happy to stay with them but want to use it in Israel. Officially they require you have the phone for 12 months to unlock. Any suggestions?
I tried checking on eBay, but nothing comes when I search with Total Wireless. Should a Verizon service work, since it's an MNVO off of them?
I am sometimes accused of overthinking things. I am still mulling over whether that accusation has merit.

Offline shwarmabob

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Re: cell phone unlocking
« Reply #575 on: July 27, 2018, 02:24:14 PM »
I tried checking on eBay, but nothing comes when I search with Total Wireless. Should a Verizon service work, since it's an MNVO off of them?
pay for an unlock service. it's about $20

Offline Thingywingy

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Re: cell phone unlocking
« Reply #576 on: July 27, 2018, 05:18:04 PM »
pay for an unlock service. it's about $20
You mean on eBay or somewhere else? On eBay I can seem to find for Total Wireless...
I am sometimes accused of overthinking things. I am still mulling over whether that accusation has merit.

Offline shwarmabob

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Re: cell phone unlocking
« Reply #577 on: July 29, 2018, 11:09:30 AM »
You mean on eBay or somewhere else? On eBay I can seem to find for Total Wireless...
this has nothing to do with ebay. You want to be able to use another provider and your phone is locked.
https://cellphoneunlock.net/
or something similar, there are many services out there. I haven't use one for a couple of years. compare the prices.

Offline Thingywingy

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Re: cell phone unlocking
« Reply #578 on: July 30, 2018, 05:19:42 PM »
I'm helping a relative who prefers purchased a Samsung T379 Gravity TXT dumb phone for service on a Canadian carrier. The listing said it was unlocked, but the buyer says it's locked. I'm trying to figure out if is in fact locked to T-mobile. I checked the IMEI number on IMEI.info, and on Swappa but they don't seem to say whether it is unlocked. Any suggestions?
I am sometimes accused of overthinking things. I am still mulling over whether that accusation has merit.

Offline ek

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Re: cell phone unlocking
« Reply #579 on: July 31, 2018, 11:50:25 AM »
I want to get a locked iphone se. They are $139 at Walmart. Can anyone recommend a reliable unlocking service?
thank you

Offline shwarmabob

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Re: cell phone unlocking
« Reply #580 on: July 31, 2018, 02:38:20 PM »
I'm helping a relative who prefers purchased a Samsung T379 Gravity TXT dumb phone for service on a Canadian carrier. The listing said it was unlocked, but the buyer says it's locked. I'm trying to figure out if is in fact locked to T-mobile. I checked the IMEI number on IMEI.info, and on Swappa but they don't seem to say whether it is unlocked. Any suggestions?
place a SIM from a different carrier into the phone, that will tell you if it's locked

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Re: cell phone unlocking
« Reply #581 on: July 31, 2018, 07:24:02 PM »
place a SIM from a different carrier into the phone, that will tell you if it's locked
I don't have. Relative is in Canada.
Seperately, are ATT prepaid phones unlocked? My mom uses ZTE Maven 3 - AT&T PREPAID on Chatr in Canada. I'm guessing the fact she uses it on Chatr means it's unlocked...?
I am sometimes accused of overthinking things. I am still mulling over whether that accusation has merit.

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Re: cell phone unlocking
« Reply #582 on: August 01, 2018, 12:33:52 AM »
I don't have. Relative is in Canada.
Seperately, are ATT prepaid phones unlocked? My mom uses ZTE Maven 3 - AT&T PREPAID on Chatr in Canada. I'm guessing the fact she uses it on Chatr means it's unlocked...?
Sometimes the phone will work on another carrier even when not unlocked but then sometimes it wont.

I'm helping a relative who prefers purchased a Samsung T379 Gravity TXT dumb phone for service on a Canadian carrier. The listing said it was unlocked, but the buyer says it's locked. I'm trying to figure out if is in fact locked to T-mobile. I checked the IMEI number on IMEI.info, and on Swappa but they don't seem to say whether it is unlocked. Any suggestions?
T-Mobile phones are extremely easy to unlock if you know someone who has a tmobile plan, all you have to do is get another service sim and call tmobile and tell them your going to some place besides for Canada or say Canada and you need more data then what they are offering as they cap it at a certain amount of gig, so you want to use a Canadian sim while abroad and they will give you the unlock code.
 
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Re: cell phone unlocking
« Reply #583 on: August 20, 2018, 12:43:37 PM »
Verizon basic phone (4g flip) PREPAID- will that work with Red Pocket Mobile? https://www.walmart.com/ip/Verizon-Kyocera-Cadence-Prepaid-Cell-Phone-16GB-Black/229903939

on the box it says "in order to partially offset the subsidy Verizon ... this phone may only be used with Verizon Prepaid service for 1 yr/ until $50 in payments are received"

Does that mean I have to go through the trouble of manually unlocking it? Is that even possible? I'm not very familiar with unlocking "sugya", can anyone explain in laymen's terms if I'd need to/how I should for Red Pocket Mobile.
Thanks

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Re: cell phone unlocking
« Reply #584 on: August 21, 2018, 12:58:02 PM »
Verizon basic phone (4g flip) PREPAID- will that work with Red Pocket Mobile? https://www.walmart.com/ip/Verizon-Kyocera-Cadence-Prepaid-Cell-Phone-16GB-Black/229903939

on the box it says "in order to partially offset the subsidy Verizon ... this phone may only be used with Verizon Prepaid service for 1 yr/ until $50 in payments are received"

Does that mean I have to go through the trouble of manually unlocking it? Is that even possible? I'm not very familiar with unlocking "sugya", can anyone explain in laymen's terms if I'd need to/how I should for Red Pocket Mobile.
Thanks

EDIT: I'd really appreciate any help in this matter.
I called RPM and gave them the IMEI Number. They told me it was locked. Also, that even once it would be unlocked it would only work over gsm network. Can anyone shed light onto this? Thanks!