Quote:
Originally Posted by 95gsrturbo
I dont understand-
If you say that the tmobile 3g frequency is 1700 and 2100 and the ATT is 2100 why can we not run the 2100 band iirc on an unlocked iphone for tmo?
OR is the latter post which says ATT only uses 1900 freq the correct answer?
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ATT uses Band II (1900 MHz) or Band V (850 MHz), T-mobile uses Band IV AWS (part lower part of 1700 MHz and lower part of 2100 MHz), it will never be compatible. The 2100 MHz band the iphone uses is Band I.
Cell receptions are achieved by calibrating the resonant crystal, which is done on hardware level, so software override is not possible