Even if it is one of the most popular smart phones from the market, iPhone have some user report problems at the active. The most troubles was found on the 3G, simple iPhone, and the 3GS models.
If your on your personal iPhone doesn't appear iTunes or you just aren't  able to sync it, you should do some certain steps before walk with it to an appropriate service.
First of all, you might need to check the battery status and if it isn't in need of a new recharge. If everything is ok at this chapter, you can check the second step from this guide and try a different USB port for your iPhone. Disconnect the device from the usual computer's slot and connect it to another, just to see if it is not from here the problem. Also try to be sure that it is an 2.0 USB type and not an elder version.
If your iPhone still not work, try to reset it by turning it off and on. Press and hold for three seconds the Wake/ Sleep button, which you will found in the top of your smart phone until  a slider appears to your display. You will need now to slide this red slider. After you completed this task, press again the Wake/ Sleep button until you will be able to see on the screen the Apple logo. Be careful to enter your SIM card Pin correctly, because if you will wrong it three times you will need to contact a carrier to enable your card again.
If it still not working, you will need to restart the personal computer and try to reconnect again the iPhone to it. Also you can try to download and reinstall the latest version of iTunes software from the Apple's Inc. official site.
Another unusual but pretty often met is when the user can't make or receive calls, send and receive SMSs, or access e-mail and browse the web. To solve this problem you will need, first of all to check your signal indicator from the status bar which can be found at the top of the screen. If there isn't any bars or you can see a message that it is telling you that there is no service available, try to move from that spot to a different location or near an open window or outdoors.
Try to be sure that you are in a covered area asking some appropriate person if his signal is ok. If you are near a computer, you might check your career's official website to see if you are in a network coverage area.
If everything it is ok until now but you still can't receive any phone call or text message , make sure that the air plane mode is on. Go in the Home Screen Menu and choose Settings and switch the Air Plane mode off or on. Wait 15 seconds and if you still didn't received any sign of functionality from your iPhone, turn this option to its initial statement. Make sure that you dial the right number, with the included area code when you try to attempt a phone call.
Try to reset your iPhone if you still encoring  troubles by pressing the Wake/Sleep button and shutting it down. Make sure also if the position of the SIM card it is correct and it stays straight into its slot.  After you open again your iPhone, check the service again and see if you still have problems. You might need to call to your carrier assistant service and see if there aren't issues with the wireless service.
You need to know that original model of iPhone does not support MMs, this service being available only for 3G and 3GS models, and only if the carrier provides this kind of service. You can check your iPhone's system features on official Apple's site.
As the supreme troubleshoot you will need to restore and update your iPhone software if all this guide steps made before didn't helped. The restore model it is just like on the iPods from second to third generation. Make sure that first of all you are backing up your iPhone files because yow will lost everything if you don't do that. For a better image think that you will reinstall an Windows or Mac OS X operating system to a mini personal computer. After you updated your iPhone, restore it and for sure it will be able to work.
