I have an unlocked HTC One S. It was with fido before I got it unlocked and got a koodo prepaid simcard. I am on the basic $15 a month prepaid plan. I am located in Marmora, On. I sometimes have service and sometimes don't. I was also in Ottawa yesterday and had no service whatsoever in some places. I had service in Ottawa yesterday and when I went to send my friend a message I had no service. My brother told me the service bar had to say 3g 4g or something along the lines of that. I was wondering if anyone knew what the problem ? Please help?