For me is interesting now for little more than low cost the cube t7 which has 64 bit octa core CPU, 4g network and better camera.
1. Make Full Backup of your apps, data, etc. if you dont want to lose them. For back up use TWRP recovery or what you want.
If you want try to flash with Flash Tool. It seems that for now we dont have Solution about the OTA 1.03 . Or stay on 1.02 till we find Solution.