Purchased on AliExpress for about 18 € in July 2026, it is totally crap.

• Does not work with a generic SIM
• Does not respond to SMS commands
  • Cannot request GPS position via SMS
  • Cannot set the APN for GPRS connection
  • Cannot set the internet server for receiving tracking data
• Does not have the microphone
• Does not have the SD card slot

There appear to be many versions of this GPS tracker on the market, all based on the same architecture, but with significant variations in the assembled modules (microphone, SD card slot, etc.).

The most significant issue, however, is the ability to program the device, which typically requires sending appropriate commands via SMS. This allows, for example, to set the APN for internet access, configure the IP address of the server to which tracking information is sent, and so on. If the manufacturer hasn't provided these features, you'll have to hope the firmware recognizes the SIM card's carrier, and you'll be forced to rely on the vendor's tracking portal.

There are currently no known methods for altering the factory-installed firmware.

domain#45.55.84.20#5010#
Domain set succsess

Default passowrd: 123456 used where?

SMS commands:

SERVER#your.ip.or.domain#port#
domain#your.ip.or.domain#port#
SERVER,0,your.ip.or.domain,port,0#
SERVER,1,45.55.84.20,5010,0#
-- apn,password,apn_name,apn_user,apn_password#
apn,123456,internet,username,password#
APN#internet.provider#username#password#
-- Get Current Location:
WHERE#
DW#
-- Check Device Status:
STATUS#
-- Replies with the IMEI, APN, IP, and tracking intervals.
PARAM#
-- Enable Vibration Alarm
SENALM,ON,1#
666#ON#
-- Power Off:
POFF#
-- Factory Reset
RESET#
SYSRST#
-- Callback: the tracker automatically calls your phone so you can listen to the surroundings:
222
-- Starts a 10-minute audio recording to the device's memory
111
-- Bind admin number
000#+393334567890#
-- Set APN
pw,123456,apn,web.ho-mobile.it,,,#
apn,web.ho-mobile.it,,,#
apn,web.ho-mobile.it,,22210#

• GF-22 User Manual
• TRV Protocol Manual (AI-generated document) The manual in Markdown and PDF formats
• GF22 GPS Tracker
• GF-09 GPS. Instruction
• GF-22 (Port and usage) - (Local copy)
• Topin 365GPS Server config - (Local copy)
• 1903 protocol instruction
• GF-22, TRV protocol, no gps location
• Mini GF-21 Protocolo S1903