Block Incoming Calls:

  1. Launch “Contacts
  2. Go to “All contacts
  3. Select the phone number/contact you want to block
  4. Tap “Edit” > “Menu
  5. Enable “All calls to voicemail

Unblock Incoming Calls:

  1. Launch “Contacts
  2. Access “All contacts
  3. Tap the contact you want to unblock
  4. Tap “Edit” > “Menu
  5. Disable “All calls to voicemail

Block Incoming Messages in Google Messenger:

  1. Open the apps drawer
  2. Launch Google “Messenger
  3. Select the message thread exchanged with the contact/phone number you want to block
  4. Tap “Menu” > “People & Options
  5. Press “Block [phone number]”
  6. Tap “OK” to confirm

NOTE: the conversation thread and future messages from the blocked contact will be archived. Notification alerts are disabled for archived messages.

Unblock Messages in Google Messenger:

  1. Open Google “Messenger
  2. Tap “Menu
  3. Access “Archived
  4. Select the conversation thread exchanged with the contact/phone number you want to unblock
  5. Tap “Menu” > “Unarchive
  6. Tap “Menu” again and access “People & Options
  7. Tap “Unblock [phone number]”

Enable Call Forwarding:

  1. Launch “Phone
  2. Tap “Menu” > “Settings
  3. Access “Call forwarding” (NOTE: this option might be unavailable if it’s not supported by your carrier)
  4. Enter or edit the phone number/contact you want to use for call forwarding
  5. Tap “Enable” to confirm

Enable Conditional Call Forwarding:

  1. Open “Phone
  2. Tap “Menu” > “Settings
  3. Access “Call forwarding
  4. Select to forward incoming calls “When unanswered”, “When unreachable” or “When busy
  5. Edit or enter the phone number you want to use for call forwarding
  6. Tap “Update” / “Enable

Disable Call Forwarding:

  1. Open “Phone
  2. Tap “Menu” > “Settings
  3. Go to “Call forwarding
  4. If necessary, select the forwarding option you want to turn off
  5. Tap “Disable



See More: ZTE Blade Spark: Manage Calls, Messages, and Call Forwarding