Samsung Galaxy S8 plus volume mod

[notredave]

Good morning all,

I'm trying to get into phone to adjust max speaker volume and tried using numbers on phone keypad. I get USSD error, connection problem or invalid MMI code on my new Galaxy S8+ on AT&T. Can someone please tell me how to adjust volume on this non-rooted phone?

Model # SN-G955U
Baseband version: G955USQU1AQD9

Can anybody tell me how to fix this?

Thank you,
Dave

 

[Qc_Anubis]

I think i know the code you're looking for and you cannot adjust speaker volume with it the only way to make volume go up is literally the volume buttons ....... Unless you're rooted ofc (if you have a warranty on it i wouldnt suggest it though.