How to manually select a Mobile Network in Samsung Galaxy Tab2 7.0(GT-P3100)?
a). Tap on Applications as shown below.
b). Now , Tap on Settings.
STEP 2. SELECTING MOBILE NETWORKS
c). Now , Tap on More under Wireless and Mobile Networks as shown below.
d). Now , Tap on Mobile Networks on the right side of the screen .
STEP 3. MANUALLY SELECTING NETWORK OPERATORS
e). Under Mobile network , Tap on Network operators as shown below.
f). Under Available networks , Tap on Search networks. Your display will tell you if you have access to the network you've chosen.
NOTE: If you're out of range of the selected network, your device won't work.