My XV6900 is experiencing missing calls problem. After the phone was used for several days, then it started to miss incoming calls while it is in sleep mode and the screen was turned off. The symptom is that the ringer did not ring on the incoming calls and the calls got registered on the phone as missed calls. I checked the ringer setting which is set to ring sound, not vibrate nor silent. Sometimes the ringer will ring a very short chip sound couple minutes after the call was long missed.

There are several other xv6900 users experiencing the same problem on other forums. Not sure if anybody have similar problem and what is the solution of that problem.

This is annoying and I contacted Verizonwireless tech support through email. The reply suggests me to do a soft reset of the phone. I did the soft reset and the problem went away. But after about 3 ~ 4 days, it reappeared. I then did another soft reset and it went away again. I am still monitoring how it goes. I usally ran couple application on the phone. Next time when it happens, I will try to close those running applications to see if it can resolve it. Otherwise I have to do a soft reset every 2 days to work around this problem. I sent Verizonwireless a second email specifying the problem and hope they could do investigation and give us some software upgrade.