Just got this phone despite phone seller claimed this phone having issues and no stock from dealers, I've decided to try. So far, I'm pleased to be different.

Anyway, if we update firmware, will we lose all data on the phones. Such as contacts, music, photos, videos, and apps?

I'm having issue with the phone's earpiece, any workarounds?

No, i meant the phone's earpiece speaker where you place to your ear. Quite a critical situation for a phone, i have tried plugging earphone headset but still the same. Only speaker phone mode worka fine.