To przełącz sobie najpierw na UMTS a potem z powrotem na LTE 
#!/bin/sh
PORT=/dev/ttyUSB0
case $1 in
"auto")
echo "Setting AUTO band selection..."
MODE='AT^SYSCFGEX="030201",3FFFFFFF,2,4,7FFFFFFFFFFFFFFF,,' gcom -d $PORT -s /etc/gcom/setmode.gcom
exit 0 ;;
"umts")
echo "Setting UMTS only - all bands..."
MODE='AT^SYSCFGEX="02",3FFFFFFF,2,4,7FFFFFFFFFFFFFFF,,' gcom -d $PORT -s /etc/gcom/setmode.gcom
exit 0 ;;
"lte")
echo "Setting LTE only - all bands..."
MODE='AT^SYSCFGEX="03",3FFFFFFF,2,4,7FFFFFFFFFFFFFFF,,' gcom -d $PORT -s /etc/gcom/setmode.gcom
exit 0 ;;
"u2100")
echo "Setting UMTS 2100 only..."
MODE='AT^SYSCFGEX="02",00400000,2,4,7FFFFFFFFFFFFFFF,,' gcom -d $PORT -s /etc/gcom/setmode.gcom
exit 0 ;;
"u900")
echo "Setting UMTS 900 only..."
MODE='AT^SYSCFGEX="02",2000000000000,2,4,7FFFFFFFFFFFFFFF,,' gcom -d $PORT -s /etc/gcom/setmode.gcom
exit 0 ;;
"l2600")
echo "Setting LTE 2600 only..."
MODE='AT^SYSCFGEX="03",3FFFFFFF,2,4,40,,' gcom -d $PORT -s /etc/gcom/setmode.gcom
exit 0 ;;
"l1800")
echo "Setting LTE 1800 only..."
MODE='AT^SYSCFGEX="03",3FFFFFFF,2,4,4,,' gcom -d $PORT -s /etc/gcom/setmode.gcom
exit 0 ;;
"l800")
echo "Setting LTE 800 only..."
MODE='AT^SYSCFGEX="03",3FFFFFFF,2,4,80000,,' gcom -d $PORT -s /etc/gcom/setmode.gcom
exit 0 ;;
*)
echo "Wrong or no RAT selected !"
esac
ZTE F601 GPON - Xiaomi Mi Router 3G - Orange Pi PC2