How to upgrade the firmware(4.05 CSV )on RT82?

How to upgrade the firmware(4.05 CSV )on Retevis RT82? Now Retevis RT82 have the last firmware version is 4.05, and it have 4 editions: Retevis RT82(CSV)-V4.05 Retevis RT82(CSV-GPS)-P4.05 Retevis RT82(GPS-REC)-S4.05 Retevis RT82(REC)-D4.05 It is well known that Retevis RT82 have tow models:GPS & NON-GPS, so we have  corresponding version for that. Do you know the…

Ailunce HD1 Update Firmware and Software

Retevis Updated the Amateur radio Ailunce HD1‘s firmware and software. The latest version is Software v1.98 and Firmware V1.53. Software v1.98 and Firmware V1.53 changelog 1. Radio screen can display below 4 modes. Display VFO-A | VFO-B Display VFO-A | CH-B Display CH-A | VFO-B Display CH-A | CH-B 2. Add Mic Gain setting on the…