Reinstall latest OS to fix whatsapp

Lately, my Whatsapp messages have been taking long to send, I see a timer for about 5 minutes and then it sends however I can still receive messages, so it's really annoying. I've uninstalled and reinstalled several times now and I have done the general "solutions" such as registering on the host routing table and applying all permissions. All my other apps work fine with internet and I am on a BIS plan. I have also done a security wipe to fix the problem but it didnt work. So I was thinking of doing a proper re-install where I wipe the OS and re-install.

My Blackberry is a 9360 and currently I am on 7.1.0 Bundle 2494. Can someone link me to this OS as I can't find it online? Or if there's a later one, could I see that one also?

If there's any other fixes for my whatsapp, could you suggest them please? Thanks

EDIT: In the UK and on Vodafone, if that's of any help to you

WOW! That's pretty radical! Doing all that work for ONE app!
All I can suggest is perhaps you should try a different app.

Heres your link!
BlackBerry Curve 9370/9360/9350 - BlackBerry Forums at CrackBerry.com

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