使用太空卡開設帳號交換聯絡時，使用帳戶名稱，而非電話號碼喺"Privacy and Security"入面，有好多設置選項為免被撞出電話號碼，請設成 "My Contacts" 或 "Nobody""Last Seen & Online" 請設成 "My Contacts" 或 "Nobody".如果唔想全世界知你個樣，"Profile Photo" 請設成 "My Contacts"唔想俾人轉寄嘅訊息連結返自己度，"Forwarded Messages" 請設成 "Nobody"你附近嘅人可以根據響聲搵你所在位置，建議設成 "My Contacts" 或 "Nobody"將 "Delete my account if away for" 設定為 "1 month"，即使有一段時間用唔到電話，

Create Telegram account with a phone number without associating with your identity.Add a "username". Share "username" instead of "phone number" to others.There are a lot of options inside the "Privacy and Security" page.Never let other search you by phone number. A simply computer program can search telephone