It seems like the caller from +6436671587 is using spoofed or unknown numbers to reach out, possibly as part of a broader scam or spam campaign. Users have reported similar calls from another number, +6436680691, around the same time, suggesting a pattern. The purpose of these calls is unclear, but they are likely unsolicited and potentially malicious. If you receive such calls, it’s best to not answer and block the number. If the calls persist, consider reporting them to your local telecom authority or using a call-blocking app to enhance your protection.
Multiple unknown numbers, including 036680691 from a call centre on Dec 4 and Dec 6, rang me but I never answered.