I finally did this yesterday and took me ages to find the right lobbys, I know plenty of you are trying also

1. First off try and get into them lobbys that Derank you, the one im talking about is the one which puts you Rank 1, with -200,000xp, 0 kills deaths time played etc, fully locked from finding a game online, and USUALLY message of the day bacically calls you a C--K lover [meant to be a malicious lobby]
MAKE SURE YOU DONT JOIN A SESSION IN PROGRESS BECAUSE IT WILL GIVE YOU 10,000,000 DEATHS

2. Now you must get into a PICK PRESTIGE lobby [loads on TTG]. Make sure in the split screen you press the right button commands to make you RANK 55 [i think its the back button] now leave

3. Prestige mode is locked, and xp is 999999, go online and get a kill or death, exit, now Prestige, you will now be 1st Prestige, rank 1, with all stats reset

NOTE - IF YOU WANT TO BE NONE PRESTIGE RANK 1 OR ANY OTHER, WITH 0 STATS, THEN SIMPLY JOIN PICK PRESTIGE LOBBY AGAIN