Email the MP3 file to your phone as an attachment. In just a minute or so, your phone should receive your file. Your phone’s email address is your 10-digit number at your carrier’s email URL. Example:
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AT & T: @mms.att.net
Sprint: @messaging.sprintpcs.com
T-Mobile: @tmomail.net
Verizon: @vzwpix.com or @vtext.com
Send a picture message or text message to your email account if your carrier is not listed. This will give you an address to reply to your phone.
Use Bluetooth technology to directly send files from your computer (at a short distance). This only works if you have a phone that is BlueTooth enabled and has the OBEX File Transfer Profile and it is also dependent on what kind of computer system you have.