RIM have come up with a fix for the issue of the 8703e reboots. A couple of our guys have installed it and haven’t had any more problems with them rebooting so it looks good.
The handheld OS update (4.2.x) for the 8703 has been posted publicly on the RIM site
The update was released to fix reboots in several markets (Richmond, Chicago, Raleigh, Honolulu, Cleveland, Columbus OH, Norfolk, Knoxville) and will need to be downloaded to a PC and loaded with desktop manager (v3.2 or better suggested). If on a BES, the customer will need to do a new enterprise activation after update.
In addition 4.2 software supports WAV files. The first point of contact for support is Blackberry care 877-654-9111.