You cannot get the IMEI number from a mobile phone number or from a SIM number

[mapuia18]

I received threatening whatsapp messages from different pre-paid sim cards, after awhile i was unable to reply these whatsapp messages, it seems the sim card was destroyed and a new pre paid sim card was used repeatedly, is there any way of finding the imei number of the phone by using these sim cards...

 

[bignastyid]

You can't, law enforcement might be able to.