Any recommended steps for upgrading the firmware on a OnePlus device specifically a 9 Pro (LE2125 \ lemonadep)?
I am currently running eOS “S” with the aim of moving to “T”. Still searching the internet for any more updates but have downloaded Oxygen OS 13 from the OnePlus website: OnePlus9ProOxygen_22.O.13_OTA_0130_all_2111112104_31a8871ffe6142d9.zip.
Just an update here, I figured this out the hard way… bricked my phone.
I used the MSM Tool to restore the device which set me back to OOS 11.2.2.2. Downloaded and manually installed the following versions of OOS releases:
OOS 11 \ 11.2.10.10 Full Rom - .\a074a7205a681509f1b84d6a2e0f75ddc2c6ab9b.zip
OOS 12 \ C.48 Full Rom - .\c25ef64fe37b632b526e0cef2f36fa046e35c032.zip
OOS 12 \ C.65 Full Rom - .\490bb705386df0e2f1b1ed4c3fa6483c045a7343.zip
OOS 13 requires at least 12 C.64 before you can upgrade. After installing C.65 above, I upgraded to 13 using the OnePlus OTA Updater on the phone which appears to be: OOS 13 \ LE2125_13.1.0.592 Full Rom - .\28009388f4ac028d413c9a7127b8aaccf007109d.zip.