Turn off the second SIM

If you own a dual-SIM version of 8110 but never need another SIM card, you can switch the phone to a single-SIM mode to conserve some battery life. To do this, run the following commands:

adb shell setprop persist.radio.multisim.config none

adb reboot

After reboot, the phone will completely start acting as a single-SIM model.

To change the settings back, you'll need to run:

adb shell setprop persist.radio.multisim.config dsds

adb shell setprop persist.moz.ril.0.network_types gsm,wcdma,lte

adb shell setprop persist.moz.ril.1.network_types gsm,wcdma,lte

adb reboot

If the data transfer settings still cannot be restored to the second SIM, you might want to run the adb shell setprop persist.moz.ril.1.network_types gsm,wcdma,lte command again and reboot or perform a factory reset.

Enable networks for both SIMs

By default, Nokia 8110 4G allows you to only select 3G or 4G network for the SIM that has data transfer enabled, other being always 2G. To enable selection of all network types for both SIMs, issue the following commands:

adb shell setprop persist.moz.ril.0.network_types gsm,wcdma,lte

adb shell setprop persist.moz.ril.1.network_types gsm,wcdma,lte

adb reboot

After reboot, you should be able to select any combination of network types for both SIMs in the "Mobile Network & Data" settings submenu.

Internet Faster Tweak

This is an old tweak for Android that works on KaiOS too. Add these lines in your list using these commands from the shell:

adb shell

setprop persist.net.tcp.buffersize.wifi 524288,1048576,2097152,524288,1048576,2097152

setprop persist.net.tcp.buffersize.umts 6144,87380,1048576,6144,87380,524288

setprop persist.net.tcp.buffersize.gprs 6144,87380,1048576,6144,87380,524288

setprop persist.net.tcp.buffersize.edge 6144,87380,524288,6144,16384,262144

setprop persist.net.tcp.buffersize.hspa 6144,87380,524288,6144,16384,262144

setprop persist.net.tcp.buffersize.lte 524288,1048576,2097152,524288,1048576,2097152

setprop persist.net.tcp.buffersize.evdo 6144,87380,1048576,6144,87380,1048576

exit

adb reboot

Now your internet surfing is faster!