TORONTO — Rogers flanker brand chatr has launched a new way for customers to top up their account online — Top Up as a Guest. In what the company says is a Canadian-first for the industry, the new Top Up as a Guest feature allows customers to top up online without having to sign into their account. Customers who forget their password, or who are topping up on behalf of another chatr customer, can do so easily online with no sign-in required. All they need is the chatr phone number they want to top up and the 12-digit PIN on...