Can I just use the code from a Gamestop digital gift certificate at the store?

I just received a digital gift certificate (via email) to use at Gamestop,
the problem is that I don't have a printer to print out the email (certificate) which has the barcode in it which needs to be scanned for me to use the money from the gift certificate at the store.
I really want to get down there and use it today and i doubt i'll be able to get to a printer any time soon,

so would it work if i was to just take my phone with the email open on the screen? (i have an iphone so the barcode is clear)

or (this would be ideal): would i be able to just give them the code from under the barcode in the email to use my electronic gamestop gift certificate?

thank you so much in advance, any help is greatly appreciated.

Sprint iphone 5 using sim card?

Just upgraded to iPhone5 I removed the sim slot and it said no sim. So did I got factory unlocked iPhone 5 or all iPhone 5 is already unlocked.

Bump doesn't work on my iphone?

I recently updated to iOS 6 on my iPhone 4S, and I can't use the Bump application. It keeps telling me to turn my location services to 'ON', but they already are… I went into the privacy and turned the Bump location service to ON, and still it holds the same message… What do I do?

Quick! Does restoring my iPhone delete everything?

Well I tried updating my iPhone but it came up with this error message and said that I needed to restore my iPhone if I want to carry on using it.

The thing is, I have so much music on my iPhone.
If I restore it, will it wipe everything off iTunes aswell or just my phone?

Added (1). Cream: 'ye' to what?

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I recently got a new Sim only contract for my iPhone 4. I have now put in the new SIM but it's constantly saying "No Service".It is with T-Mobile. Does it take time to have everything up and running or do I need to do something on my part?

What makes an unlocked iPhone?

I was just wondering, if I simply take out the sim card out of my iPhone 4 does that mean that the phone is unlocked?(because you can put another carrier's sim card into it)