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Im not sure about gsm. But with cdma it can be flashed to another cdma carrier. But it also depends on the flashing company you use. Some can only do the 4. Others can do the 4 to the 5. Some can only flash if running ios5 others can flash no matter what.

Its all in what company and what carrier really.

I know this probably doesnt help but just wanted to say what i knew about flashing a iphone.

I completely agree with you in every aspect

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A CDMA phone can only be flashed to one CDMA carrier at a time as I understand it.
But, in either case, this will not help get the threadstarter to T-Mobile since it is not a CDMA carrier.

I understand that and i heard that is possible with cricket as well

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That is correct. As you see i did mention i didnt know about gsm. I saw where cdma flashing was talked about, so i added what i knew about it. Since his is cdma it would be a better chamce of flashing to metro, page plus, virgin. Somewhere along those lines.

You do understand my point :)

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i think ios 6 available now days.

Hey karen is the version 6.1.2 available for unlocking? Do you know the website where i can purchase a sim interposer? Online or anywhere? Thank you it will be a great help!
 
It depends on what flashing company it is. A friend of mine has cricket and the flasher she uses cant flash iphones
 
Does anyone know if http://www.cdmatool.com/ is legit? still trying to figure out how to unlock iphone 4 cdma verizon :(

Im sorry man but i really dunt know if that website will really work out fur u i am not sure right now and before i used ULTRASNOW but things have changed... Now its more complex

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It depends on what flashing company it is. A friend of mine has cricket and the flasher she uses cant flash iphones

Well i live in texas and cricket is used alot theres a guy that flashes iphones to cricket but the meaning of this is that i want to know how its made and what to use...
 
Do a search on yahoo or google for cdma flashing and read up. Im actually in the middle of tryin to find a good one myself. Some are basic bs others will have full detail of whats involved and other info
 
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