用 To Call 號碼互打，通話全程加密傳輸。前 10 通接通的電話免費，接聽永遠免費。也能直接打給天晴黃頁的用戶。
Call anyone by their To Call number, encrypted in transit. Your first 10 answered calls are free, and receiving calls is always free. You can also call Sunny Yellow Pages users.
語音在傳輸過程中全程加密（DTLS-SRTP），不會被錄音。
Voice is encrypted in transit (DTLS-SRTP) and never recorded.
只算對方有接聽的電話；沒接通不算。
Only answered calls count. Missed calls never do.
之後購買通話分鐘，按實際通話時間扣，未滿一分鐘以一分鐘計。
Then buy minutes, deducted by actual talk time, rounded up to the minute.