Hi Károly,
I understand your concern.
!selrat is OK too, but it sets different bitmasks, kinda lower layer.
You will get “unknown RAT” If the current RAT configuration doesn’t match one of the defined sets. Basically the AT command is failing to show the bitmask.
For example:
at!selrat=?
!SELRAT: Index, Name
00, Automatic
01, UMTS 3G Only
02, Not Supported
03, Not Supported
04, Not Supported
05, Not Supported
06, LTE Only
07, Not Supported
08, Not Supported
Just an example 08 has CDMA but this modem doesn’t support CDMA so the AT will return “unknown RAT”
Even though the bitmask sets CDMA the modem will ignore it.
We used to use !selrat to lock the modem to 3GPP2 (CDMA).
For 3GPP the preferred way is !BAND.
If the modem is operational and at!band is showing the correct bitmasks I wouldn’t worry.
Can you please provide
Ati
at!impref?
at!image?
at!priid?
at!selrat?
at!selrat=?
at!band?
at!band=?
at!entercnd=“A710”
at!band=? (issue this again)
“but it also resets the PRI, which in turn causes a different FW-version to load. As soon as we load our preferred image again”
Which PRI is loaded before the switch?
And what is your preferred PRI?
At!priid?
Thanks,
James