This is tested Samsung Qualcomm phones S20/S21/Note20 Hong Kong and Taiwan versions.
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Prerequisities: You need to download and install Google Phone app from Google Play market (Phone by Google-Caller ID & Spam Protection)
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Dialer app by default: After the first launch, the application will ask you to make it the default dialer, confirm by selecting its blue icon from the list of available ones. You can return the native dialer after service menu manipulations (Settings - Apps - 3 dots in the upper right corner - Default apps - Phone)
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Activation of the service menu: Go to the Google Phone and dial
*#*#27663368378#*#*
for Android 10 or*#*#276633683782#*#*
for Android 11. After pressing the last asterisk, the service menu will appear. Note: pressing the "back" button will immediately return to the dialer, to return one step back in the service menu, press 3 dots in the right corner and select "Back" -
Go to the service phone settings menu: [5] RF TEST - Band Selection - Sim 1 - three points - BACK - Three points - BACK - the UE SETTING MENU will open.
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To activate 5G bands: From "UE setting menu": Protocol> NR5G> NR5G Prune Status Here you will see: “[1] Remove NR5G PRUNE” option on the last line. Choose this option. If you return to this menu later, you will see * next to "NR5G PRUNE is Removed" and the line will change to "[1] Restore NR5G PRUNE" (you can select it if you want to return the phone to the original state).
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5G Activation: UE Settings> Protocol> GCF> Remove NR Whitelisting, after that restart the phone
*5G will be enabled until the phone will factory reset or a new software version is installed.
Thanks, Any idea for Android 12?