| Versions | Replicant compatible versions | SoC | Bootloader | Modem link | Modem audio links | Modem protocol | Unit produced | RAM |
|---|---|---|---|---|---|---|---|---|
| GTA04 A4 | Replicant 2.3, 4.2 | DM3730 | Unsigned, free software, downstream | USB | * Hardware routing * Software routing |
AT, QMI | 512M | |
| GTA04 A3 | Replicant 2.3, 4.2, modem audio not supported | DM3730 | Unsigned, free software, downstream | USB | * Software routing | AT, QMI | 512M |