was warned not to pick it up; they left no voicemail

Caller: I don't know

Received two calls from this number in the last few days, automatically flagged as spam and blocked by Android.

Caller: Apple Marketing Group & The Fundraising Group

Marketing charity organisation

Rings at 5-5.30 pm and leaves no message.Happened a few times now.Mobile comes up with message "Possable Spam"

called on behalf of the Salvation Army looking for donations, probably Apple Marketing

Caller: Apple Marketing Group & The Fundraising Group

Marketing charity organisation

Calls me every few weeks. Never leaves voicemail and my phone reads it as potential spam

Unsolicited -did not leave a message. Suggest to BLOCK

Keeps calling my land line phone around late afternoon and meal times, leaves no message. Has now found my mobile phone number. My phone has detected it is of a suspicious nature. Trying to take advantage of you being distracted while they con you into some scam deal.

Caller: Probable Scam

Call listed as Warning Suspicious Calling Pattern.

second night i have received a phone call from this number , don't recognise it an they left no message
i will be blocking it , its annoying as i felt they did this last month to

Multiple calls, no message

I consider this a possible scam call. How can I block this number?