20-06-2015 10:30 PM
Yes, a 4G enabled uSIM is required for LTE signal, if you never change your SIM in the passed 4yeasrs+- then high chance that the SIM you are having is not LTE enabled just step into any DiGi service center and get it upgraded
23-06-2015 11:58 PM
1) May I know which iphone you are using?
2) Where is your location?
3) As long as your sim is U-SIM, then your sim is OK already .
07-03-2016 08:42 AM