Decrypting Backup Configuration from ZTE F660.

cd /home/user/
git clone https://github.com/j91321/rext.git
cd rext
pip3 install -r requirements.txt
python3 rext.py
load decryptors
load zte
load config_zlib_decompress
set file /home/user/config.bin
run

Another terminal do this.

cat /home/user/rext/output/{}/config.xml