[i337M] Problem with signal and LTE, soft to i9005 - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

Hi, I got my galaxy s4 i337m from my gf from Mexico nad its AT&T. I live in Poland and my mobile operator use 900 frequency but this model dont operate with it.
I was thinking how to slolve the problem that it my signal is frozen and I dont get any calls nor messages.
Can I change my soft from i337m to european i9505? Would it help with signal and I would be able to use LTE?
I am open for any suggestions.
Thanks ;D

Any ideas?

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[Q] 3G connectivity problem on i9505

Hello, I have purchased an i9505 from Bulgaria to use in Turkey. Only i9500 is available here in Turkey. Turkish mobile operators offer max. 3G mobile connection. 3G mobile connection is very very bad with stock i9505, on the other hand no problem with phone calls and text messages. I have searched for Turkish ROM but could not find any What could you recommend to improve my 3G connection?
DJouneyt said:
Hello, I have purchased an i9505 from Bulgaria to use in Turkey. Only i9500 is available here in Turkey. Turkish mobile operators offer max. 3G mobile connection. 3G mobile connection is very very bad with stock i9505, on the other hand no problem with phone calls and text messages. I have searched for Turkish ROM but could not find any What could you recommend to improve my 3G connection?
Click to expand...
Click to collapse
Hi,
Look HERE
Perhaps a new modem might help.
I have the same problem and flashed the new modem still no 3g
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Hello, I have this same problem, buy N900T [stock n900tuvucnb4] in US, to use in Europe, Poland.
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