Solved! I lost my Lenovo K6 power on 5th December 2018 . How I can search it?

Solution
You would need to have either had an app on the phone that is for tracking, or have signed up for a tracking service.

You can try contacting your carrier/service provider as they 'may' be able to help locate it. They can also turn off the service for you, so no one runs up your bill.

Also, you should really change all your account log ins and passwords to any account you accessed from the phone. Before someone else accesses them.

You may also want to read this thread... http://www.tomsguide.com/forum/id-3691600/read-track-find-phones.html
You would need to have either had an app on the phone that is for tracking, or have signed up for a tracking service.

You can try contacting your carrier/service provider as they 'may' be able to help locate it. They can also turn off the service for you, so no one runs up your bill.

Also, you should really change all your account log ins and passwords to any account you accessed from the phone. Before someone else accesses them.

You may also want to read this thread... http://www.tomsguide.com/forum/id-3691600/read-track-find-phones.html
 
Solution
The OP specified this isn't a discussion and his post was dated five days after he lost the device. That first post is a month old so he's probably moved on by now.

You could reproduce your post into a Tutorial on this subject. That would be valuable albeit not many posters read them if it's easier to start a new thread.

Point of interest though, here in the UK a SIM can;t simply transfer in the way you describe without applying for a PUK to pass to another carrier. I always answer posts such as these telling folks to contact the Service Provider asap to avoid getting a large bill for calls and mobile data the thief or finder is using. I reckon that should be paragraph one of any Tutorial and webworkings would probably provide some more essentials.