How we can trace a stolen mobile number exact location?

avaiilable the equipment of communication .

vendors only can do that, and they are only allowed to do it if they have a warrant provides the mobile phone line number and the IMEI number 

they track the presence of that phone to a BTS, but if the stolen phone is moving you should be fast to reach to that area.

 

note that accuracy is limited ot the coverage area of that BTS, or the service provider mobile tower, it's not capable to track it to exact point,

 

there are some higher capabilities higher than vendors and it's only avaliable at some governments, it cant track a phone to an exact point

you canot but vendor can trace the exact location througth the transmition between BTS and MS and MSC and by some calculation they can find the exact locaton for any sim card HOpe that help you :)