3G vehicle GPS tracker A500 upgraded to 4G A500G

3G Vehicle GPS tracker A500 stopped production and replaced by the upgraded 4G A500G.

The main changes of A500G are below compare to A500. 

1. A500G is 4G+3G+2G, A500 only 3G+2G 

2. The A500G add 1 analog input more, total 3 analog input

3. Don’t support pulse detection 

4. Don’t support GSM/GPS jamming detection 

5. Delete B24 command, also B23 command without AN field option.    

6. Delete B45 command, integrated this function to B47 command.    

7. Modify D07 command, add ACC ON/OFF interval option.

8. Improve roaming performance:

    a. Modify B01 command, add < auto_apn> field.

    b. Add S20 command to support back up APN. 

9. A500G price is much cheaper