

I achieve the same by disabling VoLTE and VoWiFi and setting the phone to LTE only in *#*#4636#*#*.
I love these service menus. *#*#3646633#*#* has so much stuff to permanently screw up on some MediaTeks. But also some useful ones like selection of frequency bands, or even specific frequency and cell id.
But yeah, some settings can persist factory reset, and some may even be illegal like Tx tests (verified that it does transmit garbage on selected frequency with SDR) or IMEI change. Not all settings are on all devices, and they may even be partially broken.
But yeah, these settings are don’t touch it for the most part (some are just huge lists of undocumented variables). Some don’t even seem to be resettable from the menu, I mean menus where you select one option, but by default they are unset. And the band mode selection on Moto G54 5G was… interesting. Rather than a nice selection menu, you can type in a number and select to add or remove it from a vector variable for 4G and 5G. Of course, nowhere does it list valid options or give a reset button.
And lastly a thing that serves me as a warning for future, when I was playing around with a leaked service program for some Realtek Ethernet adapter, I found out what eFuse memory is. There is no going back.













5G is fine when comparing with 4G. Just a step up. My issue with them is rather whatever is going on with VoLTE and VoNR. 2G/3G just worked for phone calls, but now you only get that guaranteed by purchasing a phone directly from the carrier. Hell, some carriers even blacklist or whitelist devices just because.
And in Australia phones are now getting blocked completely, even if they worked with VoLTE because the carrier decided they didn’t.. Hugh Jeffrey also made a video about that.