Just i a quick question,in area where i stay, using 8ta sim,it sometimes seem to associate with "8TA" tower,and sometimes "mtn(8TA)",so my question is..when you purhcase the 10gb deal,and the sim/device decides to roam to the mtn(8TA) tower...is the data you use still beging deducted from your 10gb...or are you billed at mtn/roaming rates......that would be disastrous!