Just unlocked my Galaxy Discover (almost identical to Ace) and tried to install the MTS sim card I have had in my BB Bold 9900 for 3 months. I can make calls but no data with 2g/edge or even in 3g area. The phone wont switch to 3G at all. However the same sim in the BB lets me browse the net on 2g/edge and switches to HSPA/3g automatically. Have tried mucking with the service menu and tried auto settings and Russia specific but maybe this phone just isn't compatible. The BB is ok but I want to use the android apps for navigation etc. Please advise ty.