ContribucionesMost RecentMost LikesSolutionsRe: How would I get the IMEI and Serial number from a phone that I lost (the box too) and was under sprint at the time? The phone number wentinactive before sprint merged with T-Mobile, but it might have been archived somewhere. How would I get the IMEI and Serial number from a phone that I lost (the box too) and was under sprint at the time? I looked everywhere and I can't find the box. I need these numbers so I can reset the phone number on my samsung account.