<human>: Summarize the given text in a few sentences.

A little back story: In April of this year I had given up a cell phone to save money. In the middle of the month, my friend suggested that he could put me on his cell phone plan and it would only cost him $5 more than what he was currently paying. I accepted and got a cheap talk/text plan (it's all I wanted seeing as he was doing me a favor). 

In late April, he told me he needed the phone back and cited 2 different reasons (his 12yo sister needed a phone/the phone was costing him more than he thought) so I gave it back on May 10th, give or take a day or so. 

Last week he messaged me online and said that I owed him $80 for using the internet on the phone he got me. Seeing as the phone was only talk/text AND that he called Sprint and had Internet service blocked (or so he told me) I don't feel like I owe him anything. He sent me a picture of the bill he got showing that 185 (I'm assuming Mb) were used from May 3rd through June 2nd. Seeing as I gave the phone back on May 10th-ish, That leaves 7 days for me to have allegedly run up an $80 bill, which I am positive I didn't do, seeing as it was impossible. 

The bill he showed me said that the phone used was 3G, and unless I'm mistaken, the phone wasn't 3G either. It was an LG Remarq.
<bot>: My former friend is trying to scam me out of $80 because his little sister looked up porn on a phone that I gave back to him a month ago.