is there anyway i could find my lost phone using imei number?

No

No. The only way to track/locate it is using Find my iPhone. If you did not set up an iCloud account on it and turn on the Find my iPhone service, then the only way to locate it is to get up and go look for it.

Yes.

I had this same problem (still do--phoen is still missing).

Do NOT get sucked into the scam site online that says they can find your phone with the IMEI number. I was so frantic that I paid those clowns $70 to do it. WHeN I figured out that htey were not doing as they said and sending me reports, I finally called Apple and was told NO, it is not possible.

If you did not have Find My iPHone on (I didn't), and you do not have insurance (Verizon can ping it if you have insurance, and they will not let you pay to do it after you've lost it) OR if you don't have an subpoena, you're out of luck, unless you can find it.

Just don't get suckered into believing that site. It's the only one that I found like it. They've even got a database where you can look up your phone IMEI number and it will show you the model, and it's correct. The rep I spoke to from Apple said more than likely someone was selling that info (Illegally) from the phone carriers, so it all looks pretty good when you're frantic.