[Users] How can I obtain the first two digits of the header From?

[Jose Gil Navarrete]

Hi.
I need to obtain the first two o three digits of the header From and add them to uri?

It's, because the telephones make the register with ten digits (area-code + telephone number), then in the call, the telephone sends the invites with 7 or 8 digits, it's because they don't use area code.

thanks in advance.

 		
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