Motorola displays insert sim and sim is inserted

Maybe your sim is expired. Try inserting your sim in another mobile that's really working.

Get the SIM card out and clean it then insert it to the slot again

This "Insert Sim"(even though already Sim inserted means) or "Sim Error","Invalid Sim",are all problem arises means that Mobile Locked to Some Network,You need to Unlock it to use other GSM Sim Card,You can Unlock the Motorola KARMA QA1 model using the Unlock code at reliable price at this site
http://www.wickedunlock.com/motorola-karma-qa1/rs11wp9/

FOR INSERT SIM:Try with another sim card, clean the sim connector of your phone, reset you phone to Factory Setting (default) using 12345. If you can open it, clean the mobile thoroughly using iPhone solution. This problem is caused by Firmware problem and Hardware problem as well.
OR:
New Software Reinstall in the Phone.
thanks.

well the phones locked to one specific carrier it wont work wen u put different sim cars in

just change the sim card,

try a diffrent sim card this will determin if its you phone or your card causing the problem

You May Have Fryd Ur Sim Card Did U Try Puttin It In Any Other Phones Besides The Other Model?

You need to replaced the entire holder which also host the keyboard,,take the phone to a mobile service center close to you and have them replace it there for you.

The sim card holder has a tiny slide mechanism. After inserting the sim card and pressing it against the body of the phone, place your finger over the card and slide it gently forward. The tiny plastic part that holds the card will snap it into place. Hard to explain, but it will work.