: Accessible via Settings > System > System Update . This is the safest way to update without data loss.
Finding specific "papers" (academic or technical whitepapers) on the ZTE Blade L220 Firmware ZTE Blade L220
Never interrupt a firmware installation; if the phone shuts down during a flash, it may "brick" (become permanently unusable). direct download link for a specific regional version of the L220 firmware? : Accessible via Settings > System > System Update