MESSAGES WITH QUESTION MARKS

You haven't mentioned whether you are dealing with iMessage or SMS issues. Verify if the recipient also sees question marks, or if it's only on your end. Knowing if the issue persists across devices can help narrow down the cause.

If you are experiencing issues specifically with iMessage, here are some steps you can take:

1. Toggle iMessage Off and On:
   1. Go to Settings on your iPhone.
   2. Scroll down and tap on "Messages."
   3. Turn off the toggle for iMessage and wait a few seconds.
   4. Turn iMessage back on.
2. Sign Out and Sign In to iMessage:
   1. In Messages, choose Messages > Settings, then click iMessage. Click Sign Out. In FaceTime, choose FaceTime > Settings, then click General. Click Sign Out.
   2. Sign back in with your Apple ID.
3. Check Date and Time Settings:
   1. Ensure that the date and time settings on your iPhone are set correctly. Incorrect date and time settings can lead to iMessage delivery issues. If you can't change the time or time zone on your Apple device

If you are experiencing issues specifically with SMS/MMS, here are some steps you can take:

1. Update Carrier Settings:
   1. Sometimes, carrier settings updates can resolve messaging issues. Check if there are any carrier updates available: Go to Settings > General > About.
   2. If a carrier update is available, you will be prompted to install it.
2. Contact Your Carrier:
   1. If the issue persists, contact your mobile carrier to ensure there are no account or network-related problems.
3. If you're sending messages to an Android device, there might be compatibility issues with certain symbols or emojis, leading to question marks appearing.
4. Question marks can sometimes appear if the iPhone doesn't recognize the specific font used in the message. This could happen if the recipient uses a different font than you or if there's a problem with the font rendering on your phone. Install and manage fonts on iPhone - Apple Support (IN)

gpf2023 wrote:

MY IPHONE 13 PRO HAVING QUESTION MARKIS APPEAR ON MY IPHONE MESSAGES THAT I SENT TO FRIENDS AFTER 1-3 DAYS.

To improve understanding of the phenomenon, it would be highly beneficial if you could share a screenshot. Visual representations carry greater impact than written descriptions.

Please remember that this is a public forum, so when attaching a screenshot, please avoid including any personal credentials such as IP addresses, card details, email IDs, Apple IDs, IMEI numbers, serial numbers, phone numbers, order IDs, or any identifiable location information if you are sharing a map.

Unfortunately, without more information, it's difficult to diagnose the exact cause of the question marks.

With the limited information that you have provided, It is hard to even guess the problems faced by you. 

You may get faster and better responses to your query by --> Writing an effective Apple Support Commun… - Apple ...

Please re-post with detail so that someone else can help.