Dialer, Contacts and Messenger apps closing automatically in Oneplus X

Since a week, the Dialer, Contacts and Messenger apps have been crashing frequently whenever I try to open them. But after few hours after crashing somehow they start working normally. I have tried clearing the data and cache, tried resetting the phone, installing third-party apps for making phone calls and messages. But even those apps are crashing, if they are related to making phone calls and messages. I tried wiping the data and making a hard reset, but still the problem persists. So please help me solving this issue. Thanks in advance.