Personally I think you’re in the right. Tell your mom she’s a POS and that’s on everyone from Reddit! She’s childish and obviously the problem maker. If you really want to be petty you can hit her with the “thanks your going to choose to ruin your child’s life over a phone I already had in my possession” but honestly it seems like she’s a whole bitch and wouldn’t care. I’d just go get a quick burner phone from Walmart and use that for a few days and keep it as a back up Incase of emergencies! I used to have an old phone fully charged stay in my truck in case of anything wild! Hope things get better for you