I normally keep negative reviews to myself... but since Ive paid hard cash for a 3cx pbx phone system,currently installed under v10, I feel its ridiculous that 3cx makes this app purposefully not work with their own previous builds. The currently compatible version for v10 of the iPhone app has been only minimally useful since it has always periodically lost its mind or crashed under actual use.
So, 3cx has gone from releasing a generic VoIP client that worked with even competitors products to one thats not even compatible with the previous release of their own software! Not cool.
Steveopp21 about 3CXPhone for 3CX Phone System 12