If a phone says 50$ per month , is that towards keeping the phone on too ?

If IT SAYS 50 DOLLARS A MONTH. YES YOUR PHONE WILL STAY ON FOR THAT MONTH. DEPENDING ON THE PLAN YOU HAVE. MAYBE LESS DATA OR LESS SOMETHING. I'M USING METROPCS WITH A 50 DOLLAR PLAN AND I GET UNLIMITED EVERYTHING. HOPE I WAS ABLE TO HELP

Well if is a $50 dollar plan it should but that's if is a plan for calling and texting but it will be different if the plan is just a payment towards just the phone, you will have to look at your contract.