Cannot make a call

This is a normal behavior when a phone does not have a valid/working SIM card. Without a valid/working SIM card or even without a SIM card, the phone can still be used for emergency call.

I hope it helps.

You can insert sim card in LG sliding phone on sim slot.After inserting it displays any error message saying "Wrong sim" or "Incorrect sim" or "Emergency calls only", etc., then your phone is probably network locked.To unlock it,visit the site WickedUnlock.com here they are providing the unlock code at reasonable cost with easy step by step unlocking instructions and unlock it.This is the fast and permanent unlocking method.
Source:http://www.wickedunlock.com/lg/rs16wp8/

Are you sure you did correct instruction how to insert LG Quantum unlock code in your phone? As my knowledge when we do unlocking phone we insert the original sim card not the unaccepted sim card. Try doing that procedure again but this time use orignal sim card when you insert lg unlock code in your phone. Good luck!

A SIM card or Subscriber Identity Module is a portable memory chip used in some models of cellular telephones. The SIM card makes it easy to switch to a new phone by simply sliding the SIM out of the old phone and into the new one. The SIM holds personal identity information, cell phone number, phone book, text messages and other data. It can be thought of as a mini hard disk that automatically activates the phone into which it is inserted.

A SIM card can come in very handy. For example, let's say your phone runs out of battery power at a friend's house. Assuming you both have SIM-based phones, you can remove the SIM card from your phone and slide it into your friend's phone to make your call. Your carrier processes the call as if it were made from your phone, so it won't count against your friend's minutes.

If you upgrade your phone there's no hassle involved. The SIM card is all you need. Just slide it into the new phone and you're good to go. You can even keep multiple phones for different purposes. An inexpensive phone in the glove compartment, for example, for emergency use, one phone for work and another for home. Just slide your SIM card into whatever phone you wish to use.

High-end cell phones can be very attractive and somewhat pricey. If you invest in an expensive phone you might want to keep it awhile. Using a SIM card, it is even possible to switch carriers and continue to use the same phone. The new carrier will simply issue you their own SIM card. The phone must be unlocked, however, and operate on the new carrier's frequency or band.


When it's not inserted properly, it displays insert .You will need to insert the sim card properly so that the message won't come up again..

This happens when no sim-card is inserted or your carrier's network is not available. Try to check the sim-card contacts or put it into another phone and see whether it works there. If the sim-card is defective you generally can exchange it for free in the nearest office of your wireless-carrier.
When the phone says "emergency calls only" it means that the phone has found a network, but it can not register in it due to the problems described above. For emergency calls network registration is not required, it is made for so you could call 911 even without any sim-card installed.

you have to unlock your phone before using it with other SIM cards, try http://www.superunlockcodes.com/ for unlocking

May just be some static on the sim card, take it out and rub it on your shirt sleeve or trouser leg, put it back in and try, may work, if it does please rate me

I had my sim card in upside down and when I switched it it worked just fine. Could possibly be your sim card is bad and if you had another phone you could test that out.

Turn off the phone. Take the battery and Sim Card out. Make sure there is no dust or dirt of where the Sim Card goes. Blow air (from your mouth) of where the Sim Card goes. Sometimes rubbing a soft pencil eraser on the Sim Card contact points can help. Then place the Sim Card back in the phone. Make sure it is in the right position; copper contacts facing downward. Put the battery back in your phone. Turn it on, and see if the smartchip rejected goes away.

If not you may need to contact your Phone Provider’s Tech Support to troubleshoot and confirm that you may need a PUK reset code to register or you may need a new Sim Card, as they do fail from time to time.

I know this sounds dum but!!
does it say
insert sim
or
insert correct sim?