Hi there guys..
Im from stable rom (10.3.4) and want to try beta but when i locally update the file it popup and say...
"The version of your selected package is lower than that of the current system. To avoid failure when booting up, downgrading is not allowed.
Can you pls help me guys..
You can use special package provided by OnePlus. Those packages are available at OnePlus forum.
Beware, your phone gets wipe while performing this step. Make sure to have backup of your device before performing this step.