I have Whatsapp in my phone, but as soon I try to open the app it closes.
If this happens, you can try to unistall this app and re-install the lastest version.
If this does not works, then Whatsapp team may make an upgrade issue.
For example, in year 2012, after an update, WhatsApp 2.8.1 on iPhone hanged/show blank screen/crash after opening.
Here is the solution:
- Close your WhatsApp application from the task bar
- Open the WhatsApp application and press the Home button to exit temporarily.
- Repeat Step 1
- Open WhatsApp and wait for the application to load. If it didn’t load and bring you back to the home screen instead, open WhatsApp again.
- Your WhatsApp should be back to working condition again!