Hello, I am living in Niederrad and having a DSL internet connection with O2. Yesterday(12.01.2022) some technician from Telecom visited our house and said that they got many complaints about the telecom connection and wanted to check our router and DSL line. There was no prior appointment. He wanted to know our telephone number, date of birth and IBAN number. Since I was not in the home, my wife call my mobile for the information. I informed the technician to come on another day. In mean time, he reset our router and checked our phone number. But he left after I said that he can visit another day so that I can personally be available. Is it normal for Telecom technician to visit customer without appointment and asking for information like telephone number, date of birth and IBAN. He also informed that he an upgrade our connection to a higher band width after checking the connection. Please let me know your feedback.
Thanks,
Sankara