I want to use another sim card - T-Mobile Sidekick II

Insert the tip of the SIM eject tool or a straightened paper clip into the hole of the SIM card tray on the side of the iPad.

Press the SIM eject tool or paper clip firmly into the hole until the SIM tray ejects.

Remove the SIM card from the tray, if necessary, and place the other SIM card in the tray.

Push the SIM card tray back into the iPad.

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video insert micro sim card into Ipad

hope this helps

Hi, what might be the possible cause of the problem is either the Sim card your using on the phone or the Sim tray where the Sim card is inserted in the phone.

You can use the Sim card in another phone to be sure the Sim card is working properly.

After that, if the Sim card works,That means that Sim tray is damaged and will need to be replaced.

Have a nice day.

Hi,
How to correct sim card error / insert sim card

Procedure to follow

Step 1: Check the sim tray or sim seater to see if it it broken, if it is, replace it
Step 2: If the sim seater/tray is not broken, clean the entire terminal.
Step 3: If the sim seater/tray is not directly on the board, trace the broken led and solder it, or you replace the broken led with another sim tray.
Step 4: If it is still not working, change the battery and put a new battery, because a virus infected battery will always give such problem.
Step 5: Finally, if the problem still persist, then check the sim card and replace with another sim card if the former is bad because a bad sim card will always display such message as insert sim card or sim card error.

Take care

SIM card slot is in top of iPhone. From iPhone Manual:

If your SIM card was not preinstalled, you must install the SIM card before you can use iPhone.

Install the SIM card:
1 Insert the end of the SIM eject tool into the hole on the SIM tray.
Press firmly and push it straight in until the tray pops out. If you don’t have a SIM eject tool, you can use the end of a paper clip.

2 Pull out the SIM tray and place the SIM card in the tray. The angled corner of the SIM ensures that the card fits only the correct way in the tray.

3 With the tray aligned as shown, carefully replace the SIM tray containing the SIM card in iPhone.

Sounds like phone is locked or firmware is bad

Try inserting the sim card in another phone. If it still doesn't work, the problem could really be with the sim card. Go to your service provider, and request for your sim card number transfered to another sim card. That is if you wanna keep the same number. You could request for another sim card if you'd like. Call your service provider.

My phones displays the message Insert SIM Card even though it has the SIM Card.