Oh no, I'm really sorry to hear you're having such a tough time with the update, Questa! A significant battery drop and app issues like WhatsApp not working are definitely frustrating. A factory reset is a last resort and can be a hassle. I haven't experienced those specific issues yet, but I'll keep a close eye on my battery and app performance. I hope Samsung provides a fix or a more helpful solution for you very soon. Thanks for sharing your experience, it's good to be aware of.