i would like to ask about the nokia code

*#92702689# Displays - 1.Serial Number, 2.Date Made, 3.Purchase Date, 4.Date of last repair (0000 for no repairs), 5.Transfer User Data. To exit this mode you need to switch your phone off then on again.

life timer: 000000:13

what does this mean?

Life timer = how many hours were spoken on the phone.

well is there a way where you can

see the

4.Date of last repair (0000 for no repairs),

No, but it's useless anyway.