As far as I know, customer service is divided into 400 and sales customer service.
400 is dedicated to answering the phone, no outgoing calls, no sales, just like 10086, answering customer questions.
If you sell customer service, it has nothing to do with the phone. It's all data and reports.
I don't know what's going on in Guangzhou, but the customer service here in Wuhan may have the opportunity to change jobs.