Possible to downgrade Android on a phone on an EE contract?

Soldato
Joined
8 Feb 2004
Posts
3,789
Location
London
Hi,

This might sound like a stupid question, but is it possible to downgrade Android from v13 to v11 on a phone that is currently on an EE contract?

It's a S21+ running Android 13, but I need to downgrade for compatibility reasons (don't ask... it's complicated). My phone isn't unlocked.

I can see ways of doing it with Odin & a firmware file, but I'm assuming this will either brick my phone or break my contract with EE, as it's not firmware supported by them?

Thanks in advance.
 
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