False Advertising

Went to the xfinity mobile website and it states "save uo to $830 with trade in".  I selected to trade in an iPhone 15 Pro Max with the highest amount of storage and it would only give me a credit of $665.  First who would need to trade in a 15 for a 15 and what phone do you need to trade in to receive $830 credit?!

Xfinity does not care about existing customers for their mobile service or anything else.  Waiting for T mobile to improve their wifi service just a bit so I can switch everything and get away from xfinity.  You would think with all the competition that is coming out they would provide better pricing and service.