Most Helpful Guy
there's only 1 reason u need another phone.. for keeping in touch with people u dont want on ur regular phone. ie: prolly cheating. from both your questions it sounds like ur man is a piece o shit and u need to move on.
Most Helpful Girl
Its not good... a ten year relationship shouldn't have any secret phones passwords u dont know or really any secret... he is either cheating.. a drug dealer... or he has joined the mafia... so unless he has all kinds of unexplained cash or is now rocking a new Boufante hairdo and a velvet track suit... its probably unfortunately the first one... sorry!😔