Settings > Messages > Blocked Contacts – Unblock anyone you need to text.
Then she tested: Text to Mom’s Android. Sent. No error. Success? Not quite. The error reappeared when she tried texting a shortcode (like a 5‑digit restaurant reservation number).
Some third-party apps can block messages. Check if you have any messaging or security apps installed:
If iMessage fails or is unavailable, your device requires explicit permission to fall back to a carrier SMS plan. Open the app on your iPhone. Scroll down and select Messages . Locate Send as SMS and toggle the switch ON .
Sarah realized the error only appeared when she tried texting non-Apple devices (her mom’s Android, her brother’s work phone). iMessages (blue bubbles) to other iPhones were working fine.

How To Turn Off Message Blocking Is Active On Iphone [best]
Settings > Messages > Blocked Contacts – Unblock anyone you need to text.
Then she tested: Text to Mom’s Android. Sent. No error. Success? Not quite. The error reappeared when she tried texting a shortcode (like a 5‑digit restaurant reservation number). how to turn off message blocking is active on iphone
Some third-party apps can block messages. Check if you have any messaging or security apps installed: Settings > Messages > Blocked Contacts – Unblock
If iMessage fails or is unavailable, your device requires explicit permission to fall back to a carrier SMS plan. Open the app on your iPhone. Scroll down and select Messages . Locate Send as SMS and toggle the switch ON . No error
Sarah realized the error only appeared when she tried texting non-Apple devices (her mom’s Android, her brother’s work phone). iMessages (blue bubbles) to other iPhones were working fine.