I've flashed 2018092612_c223v37m_dfl_pro with SP_MDT_exe_v3.1812.00.00-A2018.08.30-v1.5-unihertz obtaining the error message DL Error and a dead Jelly Pro. It is connecting but does not get flashing anymore. f<ollowing procedure as in the flashing manual does not work. Any suggestions?
K. Hind: Hope you can downgrade to 7. I luckily never updated past Android 7 because in Android 8, Google deleted the "Background Task Clear" option. That let me automatically turn off 50+ apps that were running in the background. I only have 6 running now when I turn the phone on. With light-medium texting and limited calls, I can get up to 2 days of battery life. On standby (hardly using it at all), 4 days. Google should not have taken control over people's app usage.
PS. No WiFi running-- that would kill it.
Please try to give a substantial answer. If you wanted to comment on the question or answer, just use the commenting tool. Please remember that you can always revise your answers - no need to answer the same question twice. Also, please don't forget to vote - it really helps to select the best questions and answers!