All of them
Would be pretty useless internationally without 900Mhz GSM.
Xperia A SO-04E:LTE 2100(B1)/1500(B21)/800(B19) MHz, W-CDMA 2100(I)/850(V)/800(VI/XIX) MHz, GSM 1900/1800/900/850 MHz
http://ameblo.jp/povtc/entry-11734811532.html
Would be pretty useless internationally without 900Mhz GSM.
Xperia A SO-04E:LTE 2100(B1)/1500(B21)/800(B19) MHz, W-CDMA 2100(I)/850(V)/800(VI/XIX) MHz, GSM 1900/1800/900/850 MHz
http://ameblo.jp/povtc/entry-11734811532.html
I have a question about SO-04E, Wich bands of 3G is it works? Some pages says 850, 900, 2100 MHz and others says 800, 850, 2100 MHz