4g only network mode and lte only network mode for dual sim supports. 4g only network mode opens a very useful setting of menu where advanced network configurations can be selected for dual sim setup.

Features:
• Switch to 4G only network mode
• Lock your phone in 4G/3G/2G stable network signal
• Advanced Network configurations
• SIM card and Phone information
• Settings
• Open Battery Wifi information and Usage statics

Some phone brands block opportunity to force switch network.