Second iPhone 4s with problems?

This is my second iPhone 4s in the last year that has had this problem. It often fails to alert me or is very delayed in alerting me when I have new text messages. The screen/buttons sometimes freeze too. Software is up to date and I'm really frustrated. I've tried the whole home and lock button restart and still no fix. How do I fix this? Since this isn't the first time, do you think they'd just give me a new 5 because this is ridiculous that I've had this problem with two 4s iPhones since september. I'm not rough with the phone or anything, and I don't get it wet or anything like that. I just want my phone to work since I've payed for what is suppose to be a high quality device.

I do not.know a lot about iPhones but gray there's always trouble w/ thm.next you get a new phone id lol at droids. There great I do believe

Really sounds weird because I've used iphones for years now and have never had even 1 issue like you say. My guess is its your carrier being slow delivering the messages.

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