I can not open my iphone 3g to remove the cover..where to insert the sim card

Yes, provided the iPhone 3G is not locked with any other different network. If it is then, you need to unlock the iPhone.To unlock an iPhone the remote unlock service would be a better option because, you need not give your mobile to someone else nor do you have any chance to enter the wrong unlock codes. To get such an unlocking service for your iPhone 3G approach Wickedunlock.com and by submitting the country and network to which the mobile is locked to you will be able to remove the restriction from the respective network. This will be a permanent unlocking solution. Once unlocked you can swap networks.The iPhone 3G supports Mini sim...and hence insert the respective sim size.

iPhones use a Mini Sim and you open the door with a paper clip folder out or similar object. The slot is on the outside and you will see a small hole where the paper clip can be inserted.Regular size sims will NOT fit in.

You can use a paperclip to open the SIM card try at the top of the phone. There should be a little hole there.

Turn off your iPhone 3G and make sure any cords or connector cables are removed from the device. Then, hold your iPhone 3G upright.

Locate the Sleep/Wake button and headphone jack on the very top of the iPhone. Between these two components you will see a very small hole.

Insert the tip of a paper clip into the hole to release the iPhone's SIM card tray. The small tray will pop up relatively quickly from the top of the iPhone. If there is already a SIM card in the tray, use your fingers to remove it.

Insert the SIM card you want to install into the phone facedown in the tray. Make sure the side without the reflecting panel is inserted first.

Press the SIM card tray gently back into the slot until you hear it "click" into place. Now turn your iPhone on. All of the information on the card will now be in your iPhone 3G.

To insert the SIM card into the iPhone 3G you first have to remove the SIM tray from the top of the phone, located near the power button. Use the SIM tray removal tool that came with the phone, or alternatively a paperclip. Push into the small hole and gently pull the paperclip back out the hole, the tray will come with it. Insert your SIM into the tray the correct way round and put the tray with SIM back into the slot. Hope this helps!

This is how you insert a sim in iphone 3g

There is a little hole along the top of the iphone, stick a paper click in and it ejects a tray to put your sime in.

It's not electric, so you need to give it a push

You can not open the iphone to insert a SIM card. There is a slot at the bottom of the iPhone and the SIM card goes in there. When you purchased the phone you should also have recieved a special gadget that you actually push into the bottom of the phone so that you can remove the Sim card. That is the only way to access the SIM card on the iPhone... The actual phone can not be opened..

Remove the battery cover, then remove the battery and you should see the SIM slot, the rest is self explanatory. Just replace the battery and cover when done and turn on your iPhone.

The SIM card in the iPhone is removable, but it's hidden. To remove the SIM card, you need a paper clip.

We are checking to see if this voids your iPhone warranty. If you are concerned that it might, please don't perform this task.

The iPhone's SIM card is located behind this door.
1. Locate the SIM Card Slot
The slot is located at the top of the iPhone, between the headphone jack and the power button.
The paper clip is a valuable tech tool.
2. Open the Slot
Take your paper clip and insert it into the little hole. Then firmly push down until the slot pops up.
3. Remove the SIM Card
The SIM card is in a cradle. You can pop the card out of the cradle.

To replace the SIM card, put the card back in the cradle. The cradle and card are notched in a way that forces you to replace the card on the proper side. Then just slide the card back into the iPhone.

Thanks alot,
Sanjeev Kumar