Try this to disable the FOTA update of your R281 Boosteven.
This would be helpful kung sakaling maka tuklas na ng new method on how to open line r281.
Kung may new method kayo on how to open line this device pa nmn share po hehe.
nagawa na namin po yan still pldt was able to update it. yung sakin nga besides sa dinisable ko pinalitan ko pa spelling ng naka lagay dyan sa ibaba. still nag auto update