My iPhone 4s isn't receiving iMessages?

Does anyone else have this problem? I've been thinking that my friends were ignoring me but I found out that I haven't been receiving me all along after I installed iOS 7.It's definitely not the signal.

Added (1). I already checked… I'm not that dumb like most of the people around me. I wouldn't be asking this question if that worked out well.

Can I use an iphone 4 with at&t go phone plan?

I'm using an htc vivid, which is not a go phone, on a go phone plan so I was wondering if an at&t iphone 4 would work as well. I don't care about having internet on the phone or mms. I just need unlimited call and text. Thanks.

Added (1). Nevermind everyone! I cut my sim card down and it works just fine!

I can't remove the sim from my iphone5s?

I've tried paperclips and toothpicks. I keep on poking the paperclip in but nothing happens.

Added (1). Am I supposed to push it in really hard or something?

Added (2). Am I supposed to push it in really hard or something?

Added (3). Am I supposed to push it in really hard or something?

How to enable my 3G on my iPhone 4?

I have Telus. Going to cellular and enabling it doesn't work for my phone. Well I'm not sure because it doesn't say 3G on the top of my screen

How to define A, B, C, D stock condition of iPhones and other mobile phones?

I'm trying to define accurately the condition of my iPhone, and I have heard that they are defined by A stock, B stock, C stock and D stock, but can't find a clear description of each condition.

Also, I'm trying to define PGL (Power up, good LCD), and PBL (Power up, bad LCD), but can't find a definition on these either.

Anyone have a good source for these condition grades and how to accurately define them?

ITunes keeps crashing on iPhone?

I have the 4, and I upgraded to the 7.01 and everytime I open iTunes it keeps crashing! I've already turned it off, restarted it, and its been a week since it happened. Any ideas of what i can do?

How to Unlock Canada Bell iPhone 5S/5C/4S/4 on iOS 7?

I'm planning to buy iPhone from carrier called Canada Bell, I travel every 2-3 months, so I wanna buy iPhone which can be unlocked.

So my question is, which iPhone should I buy from Canada Bell, iPhone 5S, 5C, 5, 4S or 4? Take into your considerations that all of them running iOS 7.0 / 7.0.1 / 7.0.2 or 7.x.x

I wanna buy iPhone which can be unlocked, so which one should I buy?