If your router is stuck in a boot loop due to a failed incremental update, the full firmware can restore all system partitions.
This appears to be a firmware version string commonly associated with: hktrt2861v09 firmware full
No radio, overheating chip. Diagnosis: Check the ART partition (offset 0x630000). If bytes 0-5 are not 0x020A0B0C0D0E , stop immediately. Solution: You need to extract the ART from your original bricked device (if you have a backup) or find a v09-specific donor. If your router is stuck in a boot
Inside, you might find: