Messages on iPhone 14 Pro Max working inconsistently with other iPhones

If you are experiencing a situation where messages are no longer being forwarded from your iPhone to your Mac after a specific period of time, it could indicate that the device (Mac) has been disabled or disconnected from your iPhone.

Typically, the Messages app on Apple devices allows you to sync your messages across multiple devices using the "Text Message Forwarding" feature. This feature enables you to receive and send SMS and MMS messages from your iPhone on other Apple devices, such as your Mac.

However, if your Mac is disabled or disconnected from your iPhone, this synchronization may be interrupted, resulting in messages no longer being forwarded to your Mac. Several factors could cause this situation:

1. On your iPhone, go to "Settings" > "Messages" > "Text Message Forwarding" and make sure the option for forwarding messages to your Mac is enabled. If it's disabled, you won't receive messages on your Mac. Forward SMS/MMS text messages from your iPhone to your ...
2. Both your iPhone and Mac need to be connected to the internet for message forwarding to work. Check your network connection on both devices to ensure they are connected and have a stable internet connection.
   1. Connecting to Wi-Fi is the initial step, followed by establishing an internet connection. However, it's important to note that connecting to Wi-Fi does not automatically guarantee an internet connection. In the event that you are unable to connect to Wi-Fi, the issue may stem from settings on your iPhone or the router/modem.
   2. On the other hand, if you are unable to establish an internet connection despite being connected to Wi-Fi, the problem is likely related to the settings on your router/modem. In such cases, it is advisable to promptly contact your Internet Service Provider (ISP) for assistance. Check your WiFi Router / Modem for --> Recommended settings for Wi-Fi routers and access points ...
3. Sometimes, signing out of your Apple ID on your Mac and then signing back in can help resolve syncing issues. On your Mac, go to "System Preferences" > "Internet Accounts" and sign out of your Apple ID. Then sign back in and check if message forwarding is working again.
   1. Go to Settings > Messages > Send & Receive. Tap your Apple ID, then tap Sign Out.--> Add or remove your phone number in Messages or FaceTime
4. Ensure that both your iPhone and Mac are running the latest software updates. Outdated software versions can sometimes cause compatibility issues and disrupt message forwarding.
   1. Update Over-the-Air (OTA) —> Update your iPhone or iPad - Apple Support (IN)
   2. Update using iTunes/Finder —> Update your iPhone, iPad, or iPod touch - Apple Support (IN)

iMessage (Blue) -

• iPhone to iPhone: requires internet (Either over WiFi or Cellular Service) as it is sent over internet protocol. Needs Activation on your device.
• iPhone to Android: Not available

SMS/MMS (Green) -

• iPhone to Android: does not require any internet it is sent over cellular voice protocol. Needs to be enabled by your Carrier for the SIM used by you.
• iPhone to iPhone: When iMessage is not activated or the device is not connected to the internet either over cellular or WiFi
• You need to have an SMS/MMS plan enabled by your carrier for the SIM/eSIM that you use on your device. Apple Inc does not provide SMS/MMS services.

It will turn from Blue to Green if you have enabled "Send as SMS" and whenever your iPhone is not connected to the internet it is sent as SMS (green) to all iPhone users.