internet stops working..

hello there,
i m using bb curve 9360. basically my problem is that sometimes when my data session terminates due to bad network,whatsapp stops working permanently. it cannot connect to internet even if the network becomes strong again. browser and all other apps starts to work but not whatsapp! it simply cannot open the connection. it starts to work only after i reboot my device. now in bad network conditions,i have to reboot my device quite often. can anybody diagnose the problem and tell me the solution??

Moreover, once whatsapp stops working,it will never connect to imternet even if i use wi-fi. all i can do is rebooting the device. honestly speaking, this continuous rebooting sucks.

Thanks in advanc

Have you updated your WA? Sounds like a pain. Maybe there is a better choice to use?