Open the SD card directory and create a new folder named exactly (use lowercase letters). Extract your downloaded firmware package on your computer. Locate the UPDATE.APP file.
: The correct stock ROM for the T1-701u (e.g., version C170B006 or C100B009 ). Official firmware can often be found on resources like HardReset.info or 4PDA . 2. SD Card Setup
You need a high-quality microSD card with at least 4GB of free space.