Can i keep my phone number and switch providers

- Can i keep my landline phone number if i switch providers uk
- Can i keep my landline phone number if i switch providers
- Can i keep my mobile phone number if i switch providers
- Can i keep my phone number if i switch service providers
- Can i keep my cell phone number if i switch providers
- Can i keep my same phone number if i switch providers
- Can i switch cell phone providers and keep my number
- How to change phone number in apple id