Originally Posted by onyx
Any ideas on this phone's compatibility on 3G or even 4G on T-Mobile data? What about if phone is allowed to data roam onto other networks, any possibility of getting higher speeds?
Which version would be ideal with roaming (ST18a?), and without roaming (ST18i?)?
The "i" version should work fine with T-Mobile. The "a" version is the one we would recommend to use with AT&T and they have different 3G frequencies than T-Mobile. So for T-Mobile we do recommend the "i" variant version of our phones.