"I pressed the post button but the post doesn't appear" "I get an error when I try to send a reply" - Have you ever experienced something like this when using X (formerly Twitter) on your smartphone?

As of March 2026, there are still many reports of problems with the X app on iPhone and Android, such as being unable to post or send replies. The causes vary from app bugs to communication environment and account restrictions. In this article, we will explain 7 possible causes and how to deal with each one in an easy-to-understand manner.

Let's check the failure information first

If you are unable to post, the first thing to suspect is server failure on the X side. Just checking to see if it's just you or if everyone else is in the same situation will help you avoid unnecessary responses.

The confirmation method is easy. Visit Downdetector and check if the number of X failure reports has increased rapidly. If there are a lot of reports, it's an issue on the X side and you'll have no choice but to wait for recovery.

In fact, on February 16, 2026, a large-scale global outage occurred, and symptoms such as the inability to load or post timelines were reported on all iOS, Android, and Web platforms. At this time, it took about 6 hours to recover.

If it does not seem to be a problem, proceed to the next step.

Cause 1: Unstable communication environment

If the Wi-Fi signal is weak or the mobile data communication is interrupted, the post will not reach the server even if you press the post button.

Workaround:

  • Try turning airplane mode on and off (on iPhone and Android, from Control Center or Quick Settings). This will refresh the communication
  • Try switching between Wi-Fi and mobile data (if Wi-Fi is questionable, use mobile data and vice versa)
  • Restart your Wi-Fi router (unplug it, wait 30 seconds, then plug it back in)

In other words, "Try resetting the internet once." There are surprisingly many cases where this alone can fix the problem.

Cause 2: Old version of X app

X apps are frequently updated, and problems are likely to occur if you use an older version. Especially after a major iOS/Android update, the app may not be able to keep up and posting errors may occur.

Workaround:

  • iPhone: Open the App Store → icon in the top right → scroll down and run the "X" update if available
  • Android: Open Google Play Store → icon in the top right → "Manage apps and devices" → update "X"

Even if you think it's okay because you have automatic updates turned on, it may be set to only update when connected to Wi-Fi. Be sure to check it manually.

Cause 3: Android permission settings have been reset

In the Android version of the X app, an issue has been reported several times in the past where access permissions for ``Photos and Videos'' and ``Files and Media'' are reset when the app is updated. In this state, you will not be able to post with images.

A similar bug occurred in October 2025 and was fixed in version 11.30.0, but there are cases where it recurs with subsequent updates.

Workaround (Android):

  1. Open the "Settings" app
  2. Select “Apps” → “X”
  3. Tap "Permissions"
  4. Check that "Photos and videos" is set to "Allow". If not, change it to "Allow"
  5. Check "Files and Media" as well

If this is set to "Do not allow," the app will not be able to access photos on your device and image posting will be blocked. If you are able to post just text without any problem, but only posts with images fail, first suspect this.

Cause 4: Cache is accumulating

If you continue to use the X app, cache (temporary data) will accumulate more and more. This may cause the app to become unstable and cause posting errors.

Delete cache on iPhone:

  1. Open X app
  2. Icon in the top left → "Settings and Support" → "Settings and Privacy"
  3. "Accessibility, display, language" → "Data usage settings"
  4. Tap "Media Storage" → "Delete Media Storage"
  5. Tap "Website Storage" → "Delete Webpage Storage"

Delete cache on Android:

  1. Open the "Settings" app on your device
  2. "Apps" → "X" → "Storage"
  3. Tap "Clear cache"

By the way, don't worry, even if you clear your cache, your login information and account data will not be deleted. However, please note that if you select "Delete all website storage" on your iPhone, you will need to log in again.

Cause 5: Posting restrictions

According to X official help, as of March 2026, there are the following usage restrictions:

  • Daily post limit: 2,400 (divided and managed in 30 minute increments). Reposts are also counted
  • Continuous posting of the same content: Temporarily restricted as an anti-spam measure
  • A large number of actions in a short period of time: If you perform a large number of likes, reposts, and follows in a short period of time, restrictions may apply, including posting.

In short, it's a mechanism that applies the brakes if you overdo it. In general usage, it is unlikely that the number will reach 2,400, but be careful if you are using bots or automated tools. If a restriction is applied, wait for about 1 to 3 hours and it will be lifted.

Cause 6: Account is locked or frozen

If you violate X's rules (or receive a false positive), your account may be locked or frozen. In this state, almost all operations such as posting, replying, and liking are not possible.

How to check:

  • Check if there is a notification saying "Your account is locked" when you open the X app
  • Log in to the browser version (x.com) and check the status of your account

Workaround:

  • If locked: Follow the on-screen instructions to complete phone number verification or email verification to unlock.
  • If frozen: File an appeal through X support form

Cause 7: Temporary app bug

If none of the above apply, it may be a temporary bug in the app itself. As of March 2026, there are still reports on SNS such as ``Cannot post from iPhone'' and ``Posts are not sent on Android version.''

Workaround:

  1. Force quit the app → Restart
    • iPhone: Swipe up from the bottom of the screen to display the list of apps → Swipe up on the X to exit → Reopen
    • Android: "Recent apps" button → Swipe X to exit → Reopen
  2. Restart the device (power off → on)
  3. Reinstalling the app (Uninstall → Reinstall. Don't forget to write down your login information!)
  4. Try posting in the browser version (Last resort when the app cannot be used. Access x.com in Safari/Chrome)

Roughly speaking, the most reliable workaround is to "post from the browser if there is something wrong with the app."

Checklist if the problem still persists

If it still doesn't work, please try the following final checks:

  • Does the URL or media contained in the post violate X guidelines (certain URLs may be judged as spam)
  • Is the file size of the image to be posted not exceeding 5MB (JPEG, PNG, and GIF supported. Up to 512MB for videos in MP4 and MOV)
  • Try to see if you can post by logging in with another account (you can isolate whether it is an account-specific problem or an app problem)
  • Check the official service status at X Status

FAQ

Why can I post from my PC but not from my smartphone?

This is most likely caused by a bug specific to the smartphone app or the app's permission settings (especially Android's "Photos and Videos" permission). Try updating the app and clearing the cache, and if that doesn't work, try posting from the browser version (x.com).

What is the cause if I cannot send just a reply?

It is possible that you have been blocked by the other party, that the other party has limited the range of replies (such as "only accounts you follow"), or that there is a temporary glitch in X. Please try replying to another post and see if it works properly.

What if I get the error "Your post could not be submitted"?

There may be a problem with the communication environment or there may be restrictions on posting. First, refresh communication by turning airplane mode on and then off, and if that doesn't work, wait 1 to 3 hours and try again. It may be saved in drafts, so be sure to check the drafts folder as well.

Will my data be lost if I uninstall the app?

No, data such as posting history and following/followers are stored on X's server, so they will not be deleted. If you log in after reinstalling, it will be back to normal. However, drafts are saved within the app, so they may disappear if you uninstall it.

References