Wirelessly posted (8700c: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) BlackBerry8700/4.1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102)

Sounds like he set a password. Unless he knows it you will need to do an OS wipe as the phone will not become unlocked unless you know the code. Sorry!