Fraud limits a stolen password can't lift
Minute caps on international, premium and satellite calls for every extension. Loosening any fraud control needs a password and a fresh two-factor code, and the provider sets ceilings a customer's own admin can't exceed. Yeastar documents extensive controls, such as call-frequency limits and country-IP allow-lists, but we found none of these three: a customer's own admin controls every setting. [2, 3, 6]