where can I find information about my phone by imei
My suggestion is imeidata.net. I've gotten incorrect data from the sites mentioned in other answers.

For example,  for my phone, imei.info gives the wrong data:


  Model: Sidekick LX Brand: T-MOBILE


imeidata.net is correct:

IMEI: 3536910674xxxxx
Allocating Body: BABT
Type Allocation Code: 35369106
Serial Number: 749450
Luhn Checksum: 9
Manufacturer: SAMSUNG KOREA
Brand: SAMSUNG
Model: SM-G355H