I should have mentioned that I'm on 4.3 (and yes, the 'update' screwed up my phone and it had to go for repairs). I wanted to reset the flash counter so it's ready for a repair, should that day reappear. Cos what if my phone goes wrong to the extent that I can't run TA?
I'm confused. One person says don't, the other says it won't do anything wrong. TA does warn it can brick.