To get Emei there are 2 very easy way's for a fully locked to Network iphone.
With iPhone powered on, you see the Slide Bar,
SLIDE FOR EMERGENCY
Upper right corner of the bar, there is a i in a circle, touch it! Emei appears on screen!
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Or pull out the simtray, behind that pc of plastic (simcard holder) you will get the emei, and Serial Nunmber SN
Hope the info is helpfull for you!