
*01763*8371# (*01763*VER0#) — Firmware Version.
*01763*3641# (*01763*ENG1#) — Enable Engineer Mode hold pwr key to leave then disable.
(more…)
To connect the O2 customer care free of charge, dial 4444 for the top up line, it will ask you to press 1 to continue but don’t, press 2 instead and it will divert you to the customer care free of charge.
