AT+QGMR?
EM05EFAR06A06M4G_01.200.01.200
Does this firmware work in Russia?
I heard recent firmware versions block the module functionality without possibility to revert back.
So EM05EFAR06A06M4G is the first version where the restriction were introduced.
Could you share the very latest version before that, which still works in Russia, or at least name it?