Based on the provided information, it appears that the caller with the number +6436679573 has been making missed calls, leaving either no voicemail or breathing sounds on the messages, which is quite suspicious. Although most of the comments are uncertain about the identity and purpose of the caller, one comment mentions that the number is associated with a Greenpeace telefundraiser. This suggests that the caller might be trying to reach people for fundraising purposes, but the strange behavior of leaving breathing sounds on some calls raises questions about the authenticity of these calls.
A missed call arrived at 3 pm; there was no voicemail. A quick lookup shows the number belongs to Greenoeace telefundraiser, listed on their website.
Got a missed call that left a 20‑second breathing track, so I blocked the number, FYI.
Strange.
At 3:34 pm a call came in, but I missed it and there was no voicemail.