I tried to install 2.91 on Ariza 700and Ariza 800 and ended up with continuous rolling up to 5,600 %.
I traced my steps and discovered that if you:
1. install bin 2.91
2. set default key
3. manually input keys
4. exit
This does not work. The set default key is flawed and installs a new key set "09 04" while dumping "01 01" for Charlie.
Hence do NOT set default key. (OMIT step 2)
also:
Manually install the keys for charlie and b3v, then you will be fine.
There is no need to do a factory reset as some advocate, 2.91 will work fine just flashing it and installing the keys.
I don't know what provider "09 04" is, but I also noticed GC "C1 01" is there. I have not tested to see whether or not it is auto rolling GC on TelStar 5 97 W yet.
0904 was the 2nd provider Bev was using , and did with their NFL Sunday ticket all season..and appeared to be using it again last week with some channels, along with their ECM..