Here is the hard truth: Because RDA chips are used in millions of generic devices, the manufacturers rarely host firmware publicly. You usually find the in two places:
The software suite generally consists of several key components working together: coolsand rda flash tool link
While holding the boot key, connect the device to your computer using the USB data cable. Here is the hard truth: Because RDA chips
Before proceeding, ensure your device is fully charged and that you have a backup of all data. The flashing process can potentially erase all data on your device. coolsand rda flash tool link