With the service Who Called you will always be informed of the calls you have missed when you were outside a mobile network coverage area or your phone was switched off.

You will receive the information about missed calls (phone number (if defined), the number of missed calls, the date and time of the latest call) in the form of a SMS message. When a subscriber, whom you called and who was outside TriMob network coverage area or whose phone was switched off, appears within TriMob mobile network, you will receive a SMS that the subscriber is already within the network coverage area and you can call him.   For contract subscribers the service Who Called? is activated automatically. Prepaid subscribers can activate the service   calling Contact Center number 1188 (free from TriMob mobile network or 0 800 50 1188 (free within Ukrtelecom fixed line network).

Important: the service does not work if a subscriber has barred all incoming calls and the subscriber will not receive a SMS with the phone numbers of those who called him.