We are trying to upgrade a IP400 Phone 30V2 module from R3.2.69(IPO406V2) to R7.0.12(IPO500V2). It gets upgraded but once we switch off the system/module, the module stops working with frequent on/off. It works okay upto R4.1.9 but any version beyond this, it is behaving the same. Please help anyone has faced the simillar behaviour.