I have created 3 major OTAs.
upgrading OTA from V010 to v030 is working perfectly. but OTA upgraded from v020 to V030 getting E: footer is wrong E: Signature Verification Failed
V010 - basic OTA.
V020 - added some android apps in this version.
V030 - Resolved some issues with wifi and BT sound in framework level.
I unable to understand V020 OTA to V030 OTA is not upgrading.
I thought some recovery issue but its working perfectly from V010 OTA to v030 OTA.
Can you please help me.