I'm considering between L640xl & L650. Currently I'm using L640, I bought May last year. Originally I wanted to buy L640xl but no LTE model at that time, only the L640 has LTE. After almost a year & happy with L640 I'm thinking of buying a new phone. I still like L640xl but maybe it's worth to weight between L650 as it comes originally with W10M...only worried if it doesn't have 4s exposure because I mainly take photos with the phone.