Should I Upgrade Android OS on Huawei Ascend G535 (EE Kestrel)?

[Jaffafa]

Should I Upgrade Android OS on Huwawei Ascend G535 (EE Kestrel)

Hi...

I dont have any problems with my EE Kestrel, I have read about all the differences between Jellybean, Kitkat and Lollipop but should I still upgrade from Jellybean 4.3 to Kitkat 4.4 or Lollipop ? The only thing i could do with is an improvement with battery power and WhatsApp (WhatsApp seems unreliable even on 4G LTE)

Im more worried about if i turn the phone into a brick during the upgrade or I dont want to lose nice UI because I know the google stock UI is flat and a bit dull.