I am new in this community and I register after searching and finding no answer to my specific issue.
I have a BlackBerry 9720 OS 126.96.36.1993. I am writing under Blackberry bold 9790 since I didn't find my model.
I have the error outlined in subject when I receive a phone call. I am unable to hang up the phone call. And it keeps ringing and ringing even after the person who is ringing me hung up.
The only thing I can do to stop is pulling my battery out and rebooting the phone.
I think I can't upgrade my software. Please correct me if I am wrong.
Sorry for my English, is not my native language.
Any help will be highly appreciated.