For those who have forgotten to make a backup :-)
B121 works with B170 bootloader/recovery, but not with B121 bootloader/recovery
at http://www.android-hilfe.de/thema/honor-7-downgrade-von-b170-auf-b121-loesungsfindung.742330/ we discussed about quite the same problem.
the solution can be found...
Would you guys mind sharing if you're on 5.0.2 or 5.1.1? maybe they only allow it in 5.1.1
5.0.2 (latest ATO), Netflix HD 1920*[email protected]
is working fine :)
I didn't have to fc or clear data.
does it work with any other sim card?
dos your phone still have an imei?
have you tried reinstalling b100/121 too?
you can not flash an ota update with root and custom recovery. if you search the honor7 forum, you will find dozens topics related to this problem.
for further help, you will have to provide us with more information.