What is the best cell phone to have for Rogers?

Hi I am looking to get a new cell phone sometime within the next month, the only problem is i don't know what to get. I wanted to get the iphone 3gs but im not sure if there is a better phone out there to get. I am looking for excellent reception for when i am in the basement or outside. I would like to be able to talk wherever and whenever without any interferences. The phone i have now is a lg te365 neon which is good the only problem is it shuts off randomly all the time. I had another Lg phone before then and the same thing happend as well, so i don't know whether it is the phone or it's Lg. Anyways all the help would be great.