Using CDMA phone for GSM network - Galaxy S III General

Hello there folks,
I am new to all this Android & Samsung galaxy S III world...
I recently bought Samsung galaxy S III (U.S. Cellular variant).
I know U.S. cellular is CDMA but it does have a SIM card slot.
I want to know if I root and unlock my cellphone, will I be able to use my AT&T connection.
Thanks for help.
-Champ

No.
Sim slot is for LTE.
Sent from my GT-I9300 using xda premium

champ5182 said:
Hello there folks,
I am new to all this Android & Samsung galaxy S III world...
I recently bought Samsung galaxy S III (U.S. Cellular variant).
I know U.S. cellular is CDMA but it does have a SIM card slot.
I want to know if I root and unlock my cellphone, will I be able to use my AT&T connection.
Thanks for help.
-Champ
Click to expand...
Click to collapse
You can't take a CDMA phone and use it on GSM or vice versa. The technologies are incompatible.

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Not gonna happen,Sprint tab has cdma radio which is different from GSM. Cdma devices don't use sim cards period.
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Click to collapse
T-mobile..has unlocked bootloader
What about HPSA+ and 4G/LTE on T-mobile?
devoidx said:
T-mobile..has unlocked bootloader
Click to expand...
Click to collapse
Thanks. I had read some message traffic that says AT&T version would be able to fully use 4G/LTE networks while T-mobile is limited to HPSA+? Originally I thought those were two different names for the same thing (AT&T calls LTE, HPSA+) but apparently they are different. Doesn't LTE provide better speeds than HPSA+?
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frnorke said:
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Click to expand...
Click to collapse
T-Mobile does provide LTE speeds as well but straight talk's T-Mobile is only 3G so your best bet is to get the T-Mobile S5 and unlock it and use straight talk's AT&T Sim card you currently have (given that it's a micro Sim card)
Sent from my SM-G900T using XDA Free mobile app
If i have a tmo s5 that i want to use with straight talks at&t sim do i need to buy the unlock code or can i just flash an international Rom?
And either way would i get full LTE?
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MRemy said:
My Husband recently bought a Samsung Galaxy S4 mini. Come to find out it's on CDMA network. I have unlocked the phone and rooted it. I need to know if it is possible to switch this cdma phone to gsm network?
Click to expand...
Click to collapse
you might want to look in the forum for the phone in question. this is a generic forum.
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Click to expand...
Click to collapse
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