I installed 1.41 radio which I experienced less signal so I tried to rollback to official SPRINT rom (APA_SPCS_20600_303_12700_WWE_Ship.exe).
The SPRINT installation has successfully completed radio but it fails on ext-rom installation (I guess my previous rom was BigJ r1.1 which unlock the xtrom). At present time, my ppc6700 always on serial regardless how many time I have hard reset or soft reset.
Please please help!!!