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Users(Employees) not receiving Text Messages

Renee Hunter
Updated
If users haven’t opted out but still never receive SMS, the problem is almost always device-level filtering or carrier blocking, not Visual Dispatch itself.
Below are the most common Android and iPhone settings that silently block messages—especially application-generated / A2P (application-to-person) SMS like dispatch alerts.
iPhone (iOS) – Most Common Causes
 
1️⃣ Filter Unknown Senders (BIG ONE)
Settings → Messages → Filter Unknown Senders
  • When enabled:
    • Messages from numbers not in Contacts go to Unknown Senders
    • Users often never check this tab
  • MessageMedia numbers frequently rotate → almost always “unknown”
✅ Fix: Turn this OFF
2️⃣ Number Blocked (Accidental)
Settings → Messages → Blocked Contacts
  • If any Visual Dispatch sender number (773-920-2588) is blocked → all future messages from that number are dropped
✅ Fix: Remove blocked numbers
3️⃣ Focus / Do Not Disturb (Silently Hidden)
Settings → Focus
  • Messages arrive but:
    • No notification
    • No lock-screen alert
  • Especially common with Work or Sleep Focus modes
✅ Fix:
  • Allow Messages during Focus
  • Or disable Focus temporarily
4️⃣ Notifications Disabled for Messages
Settings → Notifications → Messages
Check:
  • Allow Notifications = ON
  • Lock Screen / Banners / Sounds enabled
5️⃣ SMS vs iMessage Confusion
If Visual Dispatch sends SMS, but:
  • User expects blue iMessage
  • Message goes to SMS only and user ignores green messages
Not blocked—but frequently “missed.”
Android – Most Common Causes
 
1️⃣ Spam Protection (VERY COMMON)
Google Messages → Settings → Spam protection
  • Automatically blocks:
    • Short codes
    • Application-generated SMS
    • Numbers not in contacts
  • Often no notification at all
✅ Fix:
  • Turn Spam Protection OFF
  • Or check Spam & blocked folder
2️⃣ Sender Automatically Blocked
Messages → Settings → Blocked numbers
  • Android may auto-block after carrier flagging
✅ Fix: Remove sender from blocked list
3️⃣ Carrier-Level Filtering
Some carriers aggressively block:
  • A2P traffic
  • Rotating long numbers
  • Messages with URLs or job IDs
This happens before the phone ever sees the message
⚠️ User will swear “nothing arrived”
4️⃣ Do Not Disturb / Priority Only
Settings → Notifications → Do Not Disturb
  • Messages arrive but never surface
  • Especially common for on-call or night shifts
5️⃣ Battery Optimization / App Restrictions
Less common, but some OEMs (Samsung, Xiaomi) restrict Messages app background behavior.
Carrier-Side Issues (Hidden but Real)
Even if phones are configured correctly, carriers may block messages if they think they are:
  • Automated
  • Business-related
  • Contain URLs, job numbers, or repeated phrasing
What You Can Do (Actionable Steps)
✅ Immediate Checklist for Users
Send this to affected employees:
  1. Disable “Filter Unknown Senders” (iPhone)
  2. Check Spam / Blocked Messages
  3. Turn off Focus / Do Not Disturb temporarily
  4. Ensure Messages notifications are enabled
  5. Add the sender number to Contacts (773-920-2588)
Bottom Line
If employees “never receive” messages:
  • 📱 90% chance it’s spam filtering or unknown sender handling
  • 📡 10% chance it’s carrier-level A2P blocking

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