x10a

[aussie]

How to activate 3g in xperia x10a and st15i?

[_alexdon_]

Settings > Wireless & Networks > Mobile Networks and then you put the check from MMS & data then press OK when a box appears.

[Uliwooly]

Keep in mind that the X10a's 3G frequencies are not compatible with the European or most of the world

X10a 

850 / 1900 / 2100 / 800 

X10i

900 / 1700 / 2100