If you’ve set the SIM 1 on your Asus Zenfone Selfie as the preferred SIM card for data services, you can easily switch to SIM 2 anytime you prefer to use it without having to remove the SIM cards from the slots. The SIM 2 also supports 3G and 4G data networks.
Switching SIMs can be very useful when one data network on one SIM is poor while that on the other SIM is better. It can also be useful if you have active internet subscription on one SIM while there is no active data subscription on the other SIM.
How To Switch SIMs On Asus Zenfone Selflie Android Phone
Launch the “Settings” app
Tap on “Dual SIM card settings”
Tap on “Data service network”
Tap on the SIM 2 option and wait for the process to be completed
Tap OK if you see a prompt
Go back to “Settings”
Tap “More” > “Mobile Networks”
Tap on “SIM 2”
Ensure “Allow data usage” is toggled ON
Tap “Preferred network type”
Select the desired option
You can now browse the internet with the SIM 2.
Follow same steps above if you want to switch from SIM 2 to SIM 1 for internet browsing on the android smart phone.