3G/4G on US T-Mobile using ST18a or ST18i
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February 24th, 2012, 01:16 PM
Join Date: Feb 2011
Device(s): Sony Xperia™ S, Xperia™ Arc, Play & Neo
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Originally Posted by
I own the ST18a. It does not if you are on T-Mobile, only 2G AT&T as a roaming client. On an AT&T SIM, it is designed for 3G. Not sure about 4G LTE.
To clarify your doubt the ray is not a 4G phone.
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