Your simm card has come loose
You have to get a new sim card or you put more money onto the card
To fix a Motorola Razr that turns on but displays "Insert SIM," first, ensure that the SIM card is properly inserted and is not damaged. Remove the SIM card, clean it gently with a soft cloth, then reinsert it securely in the SIM tray. If the issue persists, try using a different SIM card to determine if the problem lies with the card itself. If none of these steps work, consider resetting the device or contacting customer support for further assistance.
Turn off the phone. Take out the battery and sim card for 30 seconds. Place the battery and sim card back in the phone, plug in the charger and turn it on. Unplug the charger, take the battery and sim card back out.
ask an at and t person
try doing a factory re set on your phone or take the sim card out for a few minutes then put it back in if that does not work then you may to take it a vodafone dealer and get them to have a look at it as you may need a new sim card
You call your carrier and activate your sim card.
I got a new blackberry and sim card
Any time you restore an iPhone you will lose your jailbreak and your unlock and you will have to start from scratch and do it all over again. You also cannot use a Boost SIM card in an iPhone as Boost is owned by Sprint/Nextel and their SIM cards use iDEN technology, not GSM. The Boost SIM cards can be used for International Roaming only and will not work on GSM networks in the US.
The plural form of SIM card is SIM cards.
sim card
sim card