I plan to have a new phone with a new contract (cause my contract is finished) but I would like to keep the old one with a new contract and give a new phone to my bro. By doing so, I want to give a present to my bro without paying the huge upfront cost. Is it possible? Let's say I got a new contract with a new phone. Three days later, I just change my usim from new one to my old one with the same plan. Then could I ask a service provider to abandon my phone? I am still paying the bill with the new phone tho.