If your device is a rugged industrial PDA made by (not Samsung), the instructions are different:
The "portable firmware" aspect refers to the , which is based on Android 7.1.1 (Nougat) . handy t700x firmware portable
Always confirm your current hardware revision (v2.1 or v3.0) before flashing. The portable package includes checksum verification to prevent corrupted updates. If your device is a rugged industrial PDA
5.7-inch HD screen with a resolution of 1440 x 720 pixels. Processor: MediaTek MT6750 Octa-core CPU (up to 1.5GHz). Memory & Storage: 2GB RAM and 16GB of internal storage. Battery: Large 3860mAh capacity. Operating System: Originally shipped with Android 7.1.1. Updating Handy T700X Firmware handy t700x firmware portable
A significant 3,860mAh battery that provides reliable all-day power.