I'm with CFI, in all but one thing - I would prefer a prospective pilot to make an appointment and drop in for a visit, or drop in and if I'm not available at that time, come back and try again. I won't offer employment based on a phone call or e-mailed resume.
Here's one though - I've never received a resume from an applicant via "normal" mail...
However, if you call my mobile phone directly, I will make a note to drop your resume in the round filing cabinet. Can't stand that. Give your friends a slap around the head for giving my number to you and encouraging you to give me a call... Do what everyone else does and follow basic courtesy...