What is the meaning of options that appear when you long-press on a phone number from contacts, quick-dial or call history?

Long press a number in your contacts, quick-dial or call history, and select “Call” on iOS devices or select “Voice Call” or “Auto Call” on Android devices to place the call with the 050 button (through Brastel IP network), or “Call Through” to place it with the "0091" button (through your mobile carrier network but using your Brastel card balance).
Just tapping instead of long-pressing will place the call with the "050" button. On some iOS versions, when viewing your contacts or call history details, you will see a phone icon. Please do not tap this icon. If you do, the call will go through your phone carrier's network and you will be charged for it by your phone carrier. To place a call with the My 050 app, tap the phone number instead.