It's unbelievable how amazing the 1x,3x&10x zoom on the expert raw of camera works, under good light. This is good engineering. Feast on how I was lucky to spot Spectrum of the Sea ship in the bay of Phuket! Brilliant 1x3x Zoom10x Zoom
Hmmm, test your battery health once on the tool, try doing a dalvik cache clean, still if it doesn't work, do a battery change. Nowadays batteries **bleep** be it on budget, mid or high end phones, thanks to network checkin nonstop