armarchindo/advan-v6-flasher — reverse-engineered prompt

Build me a simple Termux based flasher for the Advan V6 and ZLT S50 modem that feels easy enough for regular users on Android. The main flow should guide people to connect their phone to the modem wifi, make sure the modem has internet, suggest a fresh reboot and idle state first, then run the flashing process with clear next step prompts until the modem restarts on its own.

Please include the required Serial Number registration step up front, with a link users can open before continuing, because that seems to be mandatory. I also want a separate utility script for turning on Telnet and SSH after flashing.

Keep it straightforward, with user friendly messages in Indonesian, and make the install work from a single Termux command that downloads and runs the script. If there is a firmware file, verify it before flashing so the process feels safer. Also add a simple README that explains the prerequisites and exact Termux commands. Look up any current Termux details online if you need to.