**Please note that the setting steps may vary depending on the operation system of each handset.
Samsung from model Galaxy J2, Note 3 LTE, S6, A3 onward
Huawei from model P8, Mate 8, GR5 onward
OPPO from model A33, F1, R7, Mirror 5, N3 onward
SONY from model Xperia X, XZ Premium Z3 Compact onward
Vivo from model V3, X5 onward
LAVA from model 4G A1, iris 550, 4G VoLTE 560 onward
For other model please press *987#
Please Update android to the latest version
Go to "Setting"
Go to "Connections"
Go to "Mobile networks"
Go to "Access Point Names"
Select"AIS Internet"
If there is no “AIS Internet” please add new APN
**Please note that the setting steps may vary depending on the operation system of each handset.
go to Setting Menu.
Choose Connections.
Choose Mobile mode.
Choose Network mode.
Choose “LTE/3G/2G”
(auto connect).
Enable VoLTE.
Samsung from model Galaxy J2, Note 3 LTE, S6, A3 onward
Huawei from model P8, Mate 8, GR5 onward
OPPO from model A33, F1, R7, Mirror 5, N3 onward
SONY from model Xperia X, XZ Premium Z3 Compact onward
Vivo from model V3, X5 onward
LAVA from model 4G A1, iris 550, 4G VoLTE 560 onward
For other model please press *987#