V30 Vita: Firmware Zte Blade

Paid firmware sites. Never pay for free stock ROMs.

Yes, installing non-official firmware voids the warranty. However, re-flashing official ZTE firmware to fix a software issue is typically allowed. Firmware ZTE Blade V30 Vita

Press and hold the until the phone vibrates and boots up. Paid firmware sites

Over time, residual system cache can cause extreme lagging. A fresh ROM installation restores original factory speed and battery efficiency. Firmware ZTE Blade V30 Vita