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Probably from the big telcos: AT&T, Verizon/Vodafone, T-Mobile/Deutsche Telekom, BT, Virgin, etc...
Hello Kareem, it is likely a cell phone carrier that is not intentionally sketchy. So we’re talking about the phone carriers that have mass phone numbers and use them to partake in fraudulent activities. Hope this helps.
Same issue here too and I'm in the UK
