My parents had an old at&t account with rollover minutes but was still the active account they use. My friend works as a door to door solutions provider and upgraded their account to unlimited text, talk and data and added a watch for my dad. My question is: my mom has a brand new i8+ on the previous account, she wants to use that phone and keep the same number how would she do this?
Ps My friend upgraded my dads phone from s5 to s9+ add a Samsung watch and put an iPhone SE under my moms phone number. He said she could take the SIM card out from the new account and insert that into her i8+ and still keep that phone. That way she gets on the new unlimited plan and gets to use her phone that’s paid off. Is this true? Will this work? If so how do they do this?