tmobile usa radio?

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have this unlocked on tmo usa and wondered if anyone on here had experience withupgrading radio version on it... I here the 1.54 works well on att but need feedback from tmo users in usa... Phone currently has 1.16

[galaxys]

I found 1.47 has worked the best around the USA (CA,NV,TX,OH,etc) and even out of country.

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is that on tmo usa though....? or would it even matter?

[poe]

I was using 1.47 for a long time and it worked fine on t-mobile. Yesterday I tried to upgrade it to 1.54 but no luck. It seems not able to connect to t-mobile or you have to wait for a long long time. So I　ｎｏｗ　ｃｈａｎｇed to 1.51. Works fine until now.