How to know what memory size iPhone 4 is without turning it on?

I have an iPhone 4 for Verizon. The model number on the back is A1349. But when I look online that same model number applies to 8GB, 16GB, and 32GB models. So is there a way to know the size without turning it on? I ask because the digitizer is broke so I can't see. The numbers on the back are: Model No.: A1349 EMC No.: 2422 FCC ID: BCS2422B

Also is there any way to check the ESN? Apple is so aggravating that they have to make non-removable batteries.

No one knows this? Should of known Apple owner were too dumb to know anything useful. I'll just sell it broke on ebay to an iSheep

Dear iphone 4 comes in following model

A1349: iPhone 4 (CDMA model)
A1332: iPhone 4 (GSM model)
http://support.apple.com/.../kb/ht3939

About Capacity
It has following model number
iPhone 4 8 GB
iPhone 4 16 GB
iPhone 4 32 GB