Arlo would like to remind everyone that they do not offer a telephone helpline: any post or article which recommends one is a scam.
Support is available for Arlo products by starting at the official website or the Arlo app and then choosing chat or email or their support forum there.
And here is their article on avoiding scammers:
Beware of Support Scams
Multiple companies, many of which are scammers, post links and phone numbers on the web that can appear to be official Arlo Support, but they are not. These scammers claim to offer software support services on behalf of Arlo and other companies to gain access to and exploit consumers’ personal information and collect payment for ineffective support services.