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Hi zhongchubo,
Welcome to TPG Community!
I have checked your photos, and based on the details you provided.
Have you still connected the phone into the socket or to the back of the TPG modem?
Please use this as reference.
https://community.tpg.com.au/t5/Featured-Articles/NBN-FTTN-FTTB-Setup-General-Setup/ba-p/56
Regarding with the phone number change I will advice to contact customer service after your internet service is back online.