sends text messages that look like automatic missed call messages, but they never actually rang. looks like a scam to get you to phone them back.
have been doing this multiple times a day for a few days now, and today they have started actually calling but I guess they only let it ring for a split second then hang up, because it tells me i've missed a call in my phone log, but it never actually rang

Rings every day but doesn’t leave a message

Caller: Claimed it was AGL

AGL does not use landlines, only 13 hundred numbers...I called back and lady said haltingly "Hello...pause...AGL". I was immediately on guard. She asked for my personal details and I declined. I said I'd give her my account number, which I did, then she still asked for my address. I said if you can access my account, you know my address, so you tell me what it is, then I'll know you're genuine. She hedged around that, so I terminated the call. I contacted AGL through their website on live chat and they confirmed they don't use landlines. I asked them to investigate the number

they hang up as soon as you answer

Rang me 3x on different days and only says the call is coming from Sydney. I don't trust answering it cause doesn't indicate a business name and scams are all around

Caller: AGL

Calling about matters with my AGL account. Not spam.

Caller: AGL

Trying to switch me to AGL