IMPORTANT premise to upgrade to this BTS9.0.3 version: please upgrade the firmware of your BTS9000 or BTS3000n middle machine firstly, please refer to the guide article here. Firmware of BTS9000 middle machine: kernel.bts9_20170518.enc, upgrade instruction. Firmware of BTS3000n middle machine: BTS_3440_20170531.enc, upgrade instruction. Main changes and bugs fixed in this BTS9.0.3(2017-01-22) version: 1. Backup function improved; 2. NDA open speed