One of my essential whatsapp accounts doesn't work anymore for an unknown reason, i changed my device from nokia n97 to an HTC sensation and suddenly i can not get my whatsapp to work on neither of those devices!

However , when i change the account number to my other simcard (by uninstalling and reinstalling the app) , it works flawlessly.

I tried many approaches to get this fixed but unfortunately i suppose its an account number issue that i cannot resolve manually ,when i check my account info it indicates "account status: unknown" , "expiration:unknown", thought ive been using it for a such few months now.

Anyone came across this kind of issue before ? any tips to help me resolve it ? ive contacted whatsapp support and they werent helpful at all , they just recommended a clean install (which i did over 20 times ).

Thank you for your help.