i would like to know how much the new sim card reader is.
What "sim card reader"?
Apple does not sell parts or repair phones. They replace them from service stock. Honestly, if you have a 3G, just upgrade to a newer phone. I believe it is going to cost you US$149 for an out of warranty replacement for a 3G.
Or simply clarify the issue the device is actually having.
Apple does not repair devices, they offer Out of Warranty replacements for $199 (4S) or $149 (older models) in the US.
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