How to block a telephone number?

Question from Hielke:
How to block a particular phone number when you want to prevent someone from calling you?

Answer from @Lidwien:

This is only possible for numbers stored in your contacts (so if it isn’t already in your contact list you will need to add it first)

  • Go to the ‘People’ app.
  • Go to the contact you want to block
  • Tap on it and then go to the settings button at the bottom left below on your phone
  • Tap the option to “Block incoming calls direct”

Addition from Toon:

It will show six possibilities after tapping far left below.
[The to block number must be on your phone memory. If necessary copy the number from sim/sd-card to the phone.]

This question was originally placed on the old forum.