Why won't my 3G work on my iPhone 4S?

I have a iPhone 4S and my 3G won't work I have 1gb of Internet but it won't work? At school or outside? Most of the time ill have 5 bars of signal but it still don't work! POINTS FOR BEST AWNSER.

Help identifying iphone 4 or 4s

I'm buying an iphone online and the buyer is convinced that the phone is an iphone 4 but when I looked up the model number it shows up as a 4s. It's a sprint phone and the model number is A1387 EMC 2430

ID Number BCGE2430A

can anybody help me?

Jay-Z magna carta holy grail?

You can download a copy of the entire Jay-Z Magna Carta Holy Grail album for free in MP3 format for your iPhone, Android, or PC by visiting the link below. I got mine earlier today from this site, it's a pretty good album and the download speed is very fast!

http://www.teamg0.com/threads/jay-z-magna-carta-holy-grail-full-album-mp3-download.496/

IPhone 5 won't stay connected to Wi-Fi?

My phone will not stay connected to Wi-Fi. I have to manual connect every single time and within 30 seconds of the screen being locked, I lose Wi-Fi n then again need to manual click to connect. I have many other electronics that have no problem connecting and staying connected to the same Wi-Fi. Someone help? Please?!

How to move my book marks from an ipad to an iphone?

I have added some website shortcuts with custom icons to my home screen on my iPad, and I want to transfer them to my iPhone, so how can I transfer these shortcuts with their icons to the iPhone without Wi-Fi connection

Wireless sometimes can't be detected?

My computer recently has been having some problems with my home wireless.
The modem and wireless itself is fine, my iPhone can connect to the internet no problem.
But once in a while, even when I'm in the process of opening some websites, the Wi-Fi suddenly springs up a limited access yellow triangle. And when I disconnect the limited access triangle, it can't detect any networks at all (There's usually a couple of wireless networks in my neighbourhood that I can at least detect).
It's not a big problem, because after I go through the network troubleshoot to restart my wireless adapter it works fine.It's just that it has been happening daily now, and I'm confused as to why and how can I stop making it happen.
The only recent change I can possibly think of I made to my internet is that I replaced my home internet dsl scrubber.

Added (1). EDIT: My bad, I meant that the only thing I did was I replaced my internet adsl filter.
Just to ask, if I do buy a new network adapter, is it possible for a lay person to install it herself? I have never ever opened a PC harddrive before.

My iPhone runs out of battery quickly?

I just got my iPhone on my birthday 7/2 and I love it. One problem it runs out of battery extremely quick. I did an experiment last night I took a screen shot of my screen being at 100% and when I woke up it was at 73% I cancelled all my apps the night before but it just runs out really quickly

Is there anyone who knows how to download Cydia onto my iphone 4s?

I'm having a very big problem with downloading Cydia onto my phone the reason because. Everytime I go on this website and it is called Jailbreakme.com and everytime I go on it. It will not let on it. Because everytime I go it. It will just say index of and then after that than it will just say 404 not found and I have no idea what that means. But I do have Cydia but it will just give me this which I do not understand and that is evasi0n or redsn0w and I have no idea how to do this. Can someone please help me with this problem.