Whos wrong

I decided to let my bf join my tmobil plan and he had the nerve to buy a new iphone 6 were broke he was just suppose to switch over wrr getting our first apartment and have no furniture yet  ion think its fair because i been wanting to upgrade my iphone but havent because ik we cant afford it. He didnt pay it off he makes payments. But he claims he never buys himself sumn nice which he doesnt but still. Should i let him keep it and stop over exaggerating or us he wrong