Very often, you have to dig around in navbars and footers for a phone number or an email address. In some cases, it feels like you need to be Sherlock Holmes to find it and it becomes very frustrating! In fact, if I struggle to find it within a minute or 2, I'll just leave.
For me, the first thing I look for is an Online Chat. If they don't have that, I will look for an email address or an online contact form and failing that, a phone number. I'm not a fan of talking on the phone, especially if I have a simple question about something and I'm not alone. For people aged 54 and below, the majority of people would prefer to use text over voice as a form of communication on a mobile device so it's no wonder that messaging apps such as WhatsApp and Facebook Messenger have become so popular.