You hit the donkey on the head! long story short i bought a contract for 3 years, iPhone 7 plus, two months into my contract i left my phone on the car roof over night so it was water damaged and i assumed it was broken as it wouldn't power on. Nearly a year has passed and i was going to sell all my old broken phones but i wiped them before i sold them ofc. Realised the iPhone 7 still worked! Problem was i already told the carrier my phone was broke so they sent me a replacement and blocked the old one!