How to get ETA for England and Netherlands without having a cell phone?

The ETIAS for the Netherlands and the rest of the Schengen area has not yet been implemented. A starting date isn’t announced.
The ETA for the UK can be applied for at the official website; https://apply-for-an-eta.homeoffice.gov.uk/apply/electronic-travel-authorisation/how-to-apply

Pamela, according to the website, you can apply for the UK ETA online. Instructions here on how to apply without a phone:
https://apply-for-an-eta.homeoffice.gov.uk/apply/electronic-travel-authorisation/how-to-apply

Other general info on the site:
https://www.gov.uk/guidance/apply-for-an-electronic-travel-authorisation-eta#apply-for-an-eta

In this previous thread, poster Simon stated that he did his application online and it wasn't difficult:
https://community.ricksteves.com/travel-forum/england/uk-eta-application-experience