I can't say it enough. Android, android, and again android.
The android phones of today are all light years ahead of the current iphone.
The newest one out is the Galaxy S3, and it will get the best battery life out of any of them as it has the new low energy processor. It is 199 on every U.S. carrier. I recommend this phone if you dont mind spending the 199. It has every feature you could need/want and has nfc built in which is the wave of the future in making payments in stores.(You just wave your phone and money is deducted for your store purchase).
If you want to spend less, make sure you get an android phone with the following features:
+++LTE, this is the new ultra fast network that rivals the speed of some cable modems. Verizon and ATT networks are live now. Verizon's is live in most of the Country, ATT is adding new cities every month. Sprint's goes live shortly. Phones range from free to 200 in price with these features.
+++screen of at least 4" and with gorilla glass. Gorilla glass prevents the screen from being scratched, great if you put in your pocket with car keys, tend to drop your phone, etc
+++8 megapixel camera. This way you can easily take pictures for shops if you dont want to bring a separete camera.
+++Android operating System Gingerbread at the minimum, but android 4.0 would be better way to go since that is the newest. If the phone has gingerbread, it will be upgraded later this year to 4.0
+++expandable memory card slot. Many of the phones have this, but not all. Make sure it has it so you can put a memory card in and use for storing pictures, music, etc
+++removable battery. Most have it, but a few don't. This will allow you to purchase a spare battery or get an extended battery if you dont mind the weight. Needed if your using your phone to do shops.
+++Brand: Samsung, HTC, Motorola are all ok. LG I generally say stay away from because they take too long to fix bugs in their software and support is lacking.
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There are no stupid questions, but there are a lot of inquisitive idiots
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When you try to please everybody, you end up pleasing nobody