Big mistake switching to tmobile sims. Uncategorized July 5, 2021 Forums AndroidCentralLeave a Comment on Big mistake switching to tmobile sims. I switched sims from sprint to tmobile and my service went to crap. I went back and they put my sprint sims back in. Now i am having all kinds of data issues. My husband is siting right next to me and i cant even send a picture to him. Sharing is caring!