I recently switched from T-Mobile over to Verizon. I replaced my old trusty Samsung Galaxy S9+ with the new Galaxy S20+ 5G. I was immediately disappointed with the quality of 5G service. None of my attempts to disable 5G seemed to work. I eventually tried a different dialer app. I ended up trying out Googles Phone App. It didn’t seem to work with the normal *#CODE#* syntax that T-Mobile’s Samsung Galaxy phone used. I ended up finding an article with some codes and the correct syntax, *#*#CODE#*#*. Using this syntax I tried the regular 0011 code for basic information about my phone and voila! It worked!
In order to disable 5G on your handset you will need to download a different dialer app. As mentioned previously I chose to use Google’s Phone app. You can bring up basic information about your handset using the *#*#0011#*#* code. This will bring up the ServiceMode menu. It will tell you exactly what NR Band you are connected to.
- Open the Google Phone app
- Enter Code *#*#0011#*#* for ServiceMode Information Menu.
- Find what NR band (5G) you are connected to.
- Select the three dots in the upper left of your screen and select END.
- Back in the Google Phone app enter the code *#*#2263#*#*.
- You will now see a different ServiceMode Menu for wireless radio configuration.
- Select option  NR5G Band Preferences (*)
- Unselect by tapping any NR Bands with the (*) at the end of the item.
- Select option  Go Main
- Select option  — Apply band configuration.
- You can close the menu by selecting the three dots in the upper right of your handsets screen and selecting END.