Locking custom LTE bands on ZTE MF286

My ZTE MF286 is running DNA firmware version B04. It's somewhat limited in LTE band selection, but that can easily be worked around with curl.

First of all authenticate to device using web browser. Otherwise these commands will return failure. You want to see {"result":"success"} message.

# 2100MHz (B1) / 1800MHz (B3) / 2600MHz (B7) / 800MHz (B20) / 700MHz (B28) - this is default setting

curl -s -H "Referer: http://192.168.1.1/index.html" "http://192.168.1.1/goform/goform_set_cmd_process?isTest=false&goformId=SET_NETWORK_BAND_LOCK&lte_band_lock=0x8080045"

# 1800MHz (B3) only

curl -s -H "Referer: http://192.168.1.1/index.html" "http://192.168.1.1/goform/goform_set_cmd_process?isTest=false&goformId=SET_NETWORK_BAND_LOCK&lte_band_lock=0x04"

# 2600MHz (B7) only

curl -s -H "Referer: http://192.168.1.1/index.html" "http://192.168.1.1/goform/goform_set_cmd_process?isTest=false&goformId=SET_NETWORK_BAND_LOCK&lte_band_lock=0x40"

# 800MHz (B20) only

curl -s -H "Referer: http://192.168.1.1/index.html" "http://192.168.1.1/goform/goform_set_cmd_process?isTest=false&goformId=SET_NETWORK_BAND_LOCK&lte_band_lock=0x80000"

# 700MHz (B28) only

curl -s -H "Referer: http://192.168.1.1/index.html" "http://192.168.1.1/goform/goform_set_cmd_process?isTest=false&goformId=SET_NETWORK_BAND_LOCK&lte_band_lock=0x8000000"

# 1800MHz (B3) / 2600MHz (B7) only

curl -s -H "Referer: http://192.168.1.1/index.html" "http://192.168.1.1/goform/goform_set_cmd_process?isTest=false&goformId=SET_NETWORK_BAND_LOCK&lte_band_lock=0x45"

# 800MHz (B20) / 2600MHz (B7) only

curl -s -H "Referer: http://192.168.1.1/index.html" "http://192.168.1.1/goform/goform_set_cmd_process?isTest=false&goformId=SET_NETWORK_BAND_LOCK&lte_band_lock=0x80040"

# 800MHz (B20) / 1800MHz (B3) only

curl -s -H "Referer: http://192.168.1.1/index.html" "http://192.168.1.1/goform/goform_set_cmd_process?isTest=false&goformId=SET_NETWORK_BAND_LOCK&lte_band_lock=0x80004"

# 700MHz (B28) / 800MHz (B20) only

curl -s -H "Referer: http://192.168.1.1/index.html" "http://192.168.1.1/goform/goform_set_cmd_process?isTest=false&goformId=SET_NETWORK_BAND_LOCK&lte_band_lock=0x8080000"