So I can only advise you to flash complete ROM because probably during update something went wrong.
Please read full instruction before doing anything.
Here is SPFT instruction http://community.umidigi.com/thread-16931-1-1.html
And here you have all available ROMs http://community.umidigi.com/forum-178-1.html
If problem will exist after flashing I can recommend use previous firmware to test hardware.