Yes, you can log on to non-preferred networks to make voice calls and SMS when Network Lock is activated.

Data roaming usage will only be limited to preferred networks.

Yes, you can use data roaming on any network in a country that does not have a preferred network.

The Network Lock feature does not connect you automatically to a preferred network.

If your device setting is on “Auto Network Selection” mode, you will be connected to the network with the strongest coverage based on your current location.

Network Lock will disable data roaming usage if your device connects to a non-preferred network in Data Passport and Daily Passport countries.

You can manually select and connect to the preferred network on your device to minimize any disruption to data usage.