Firmware Zte Blade V30 Vita Fixed -

If your device is stuck in a bootloop but you cannot access a computer, a factory reset via stock recovery can resolve minor software corruptions without a full firmware re-flash. Turn off your device completely.

After the process completes, the phone will reboot. The first boot may take up to 10 minutes as it rebuilds the cache. firmware zte blade v30 vita fixed

Check Device Manager; if you see "Unknown Device," reinstall the Unisoc/SPD drivers. If your device is stuck in a bootloop