Reading this bilanz.ch article, I came across these 5 inputs for telecommunications companies:
Bring products on the market that are simpler to understand.
As an alternative to using free mobile phones or mobile phones at reduced prices to attract customers, consider offering lower prices for using the mobile phones to communicate.
Introduce test offers to reduce the fear customers have of changing provider.
Make contract conditions more customer friendly.
A customer wants to use his/her mobile phone to communicate. Consequently, save the customer from administrative hurdles by improving customer service.