Report on using Orange Mobicarte in France

[inquisitor]

Try "orange.fr" as APN despite just "orange" should work, too. Maybe Orange in the meantime refuse connections from non-handsets by IMEI (serial number) as the "Orange Max" data option is limited to handset use by their terms and conditions.

EDIT: Have you actually placed a phone call with your SIM card? I remember that you had to place a call in order the SIM got get fully activated. Just try calling some toll-free French number.