My sister, who is on my plan, had the exact same problem with her iPhone 4. She was also getting a strange black screen informing her the phone was overheating - the phone was sitting on her coffee table, out of the sun and not being used. After almost a week of daily phone calls to Rogers, we discovered it was hardware problem and her phone was replaced. Since then, we haven't had a single problem with her phone.
After 3 additional calls to Rogers, all the charges for data overage were reversed but it did take some work. I went through all her past bills and highlighted her personal data usage to show this was NOT her problem and, in all honesty, was physically impossible. She's not an avid video watcher nor does she play online games. She checks her email from her home (where there's wifi) then heads to work (again, where there's wifi) and then back home. She usually is in an area that doesn't have wifi for no more than an hour a day.
This wasn't an easy task and I was, on more than one occassion, called a liar by a Rogers employee. I've been a devote rogers customer for close to 10 years and, prior to that, a faithful employee during my high school years. I was quite upset with the treatment I received but the outcome was acceptable. I only hope no one else has to go through the **bleep** I did to simply get a broken phone replaced (oh, and the phone was a whole 6 months old - definitely still in warranty).
