iPhone Messaging Issues After SIM Swap: Guidance for Partners

Overview

When customers swap SIMs (e.g. new service activation, port-in, or replacement), they may report that messages are showing as "Not Delivered".

It's important to distinguish between SMS/MMS (carrier responsibility) and iMessage (an Apple service):

• If SMS/MMS are not working: follow the checks below. If still unresolved, log a ticket with CommsChannel.
• If SMS/MMS are working but iMessage is not: this is an Apple/iOS issue. The troubleshooting steps below are provided as an assistance guide only. These cases should not be logged with CommsChannel.

Step 1: Confirm SMS Functionality

1. Test SIM in Another Device: place the customer's SIM in a known working handset.
   • If SMS works in the second handset: the issue is device/iOS related (iMessage or device configuration).
   • If SMS does not work in the second handset: proceed with network/SMS checks.
2. Restart the iPhone and toggle Airplane Mode to clear the network cache.
3. Check coverage: ensure the device has a stable mobile signal.

If SMS is still not working after these checks, log a ticket with CommsChannel Helpdesk, including the number, device details, and steps already performed.

Step 2: If SMS Works but iMessage Fails

Advise the customer to check the following on their iPhone.

Quick Fix

• Restart iPhone and toggle Airplane Mode.
• Check internet connection (Wi-Fi or mobile data).

Settings to Verify

1. Correct Number in Settings: go to Settings > Phone and confirm the correct mobile number is listed.
2. Enable iMessage and Send as SMS: go to Settings > Messages and confirm both are on.
3. Send & Receive Configuration: in Settings > Messages > Send & Receive, confirm the correct phone number is ticked.
4. Carrier Settings Update: go to Settings > General > About. If prompted, install the update.

Advanced Options

• Reset Network Settings: Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings.
• Factory Reset (last resort): only attempt a factory reset if recommended by a qualified Apple or IT technician.
• Apple Support: for unresolved iMessage cases, advise the customer to contact Apple directly.

Note for Partners

• Only log tickets with CommsChannel if SMS is not functioning on multiple handsets.
• iMessage issues are outside carrier scope; partners should manage these directly with the customer or Apple.
• Always confirm troubleshooting steps taken before escalation.