I am using RConnectionMonitor to observe the connection status of an internet connection initiated using RConnection. The software usually works OK on most Series 60 platform 2 handsets. However on one or two it appears not to respond to changes in bearer or connection status. For example

6630 Firmware v2.39.129 it works OK
7610 Firmware v4.0421.4 it works OK

6630 Firmware v2.39.15 it doesn't
6670 Firmware v4.0437.4 it doesn't

Are there any known issues with this class with respect to firmware revisions or handsets ?