When a message gets stuck on “sending,” the problem usually isn’t the message itself. It's more about the network, the device, or whether the app can actually send the message at that moment. For any messaging app to work, a few things need to click behind the scenes. Your phone, the network, the server, and the recipient's device all have to be in sync. If even one of these links fails, your message goes nowhere.
Here are some of the most common reasons this happens.
1. Weak signals and dead zones
In weak signal areas, the phone may still show bars but data transfer is unstable. Messages often stay stuck on “sending” because the upload cannot complete.
Dead zones usually happen indoors, in basements, elevators, subway stations, or buildings with thick walls. Your phone tries to reconnect, but it can’t hold the signal long enough to finish the job.
In low signal areas, text messages sometimes go through after a delay, while images or voice messages fail more often because they need continuous upload time.
If the signal briefly improves, the message may suddenly send without any user action, since the app keeps trying to send it in the background.
Try turning airplane mode on for a few seconds and then off again. This forces the phone to reconnect to the strongest available network and can trigger the message to resend.
2. Switching between Wi-Fi and mobile data
Switching networks can interrupt a message that is already being sent. This often happens when a phone moves out of Wi-Fi range or when mobile data takes over after Wi-Fi drops.
During the switch, the connection may briefly pause for a few seconds. If a message is in the middle of uploading, that pause can interrupt the upload.
Some phones stay “stuck” on weak Wi-Fi even when mobile data is stronger. In that case, the message keeps trying to send through Wi-Fi and fails instead of switching smoothly.
This issue is more noticeable when leaving buildings or moving between indoor and outdoor spaces.
Turning Wi-Fi off manually before moving between networks can help prevent the message from getting stuck during the network switch.
3. Large photos and video files
The bigger the file, the more sensitive it is to even the tiniest connection hiccups. A photo taken in high resolution can be several megabytes in size. If the connection interrupts even briefly during upload, the message may fail instead of resuming.
Videos are even trickier, as they need a much longer window of uninterrupted signal. Even small fluctuations in speed can break the upload.
Some apps compress media before sending, but compression still depends on stable processing and network availability at the start of the upload.
Reducing image quality or sending files one at a time can improve success rate.
4. Outdated apps or device glitches
Outdated app versions can cause messages to fail silently. It might look like it’s sending, but if the app is out of sync with the server, it won't go through. Updating the app to the latest version is often necessary, since older versions may not work well with the current messaging system.
Low device storage can also block sending. When storage is almost full, the app may not have enough temporary space to process media or message data.
If the app runs in the background for too long, the system may restrict its activity to save resources. In that case, messages often send only after reopening the app.
When in doubt, a full restart of your phone can clear out those weird background glitches.
5. Background data and battery settings
Phone settings can block message delivery without you noticing.
Battery saver mode can limit background data usage. When this is active, messages may not send until the app is opened again.
Some phones restrict background data per app. If messaging apps are limited in settings, they may appear normal but fail to send messages in the background.
Permission settings can also affect sending behavior after updates or system resets. If network access or background activity is restricted, message delivery becomes inconsistent.
These issues often show up without clear warnings, so users only notice them when messages stay stuck.
6. Server delays or account issues
Sometimes the problem is not on the phone but on the account or service side.
If there is a problem with the account, such as temporary restrictions or verification issues, messages may fail to deliver even if they look sent on your side.
Messaging apps rely on servers to route messages between users. If those servers are under load or experiencing delays, messages may stay in a pending state longer than usual.
Account-level restrictions are less common, but they do exist. In those cases, messages may send locally but never reach the recipient.
These issues usually cannot be fixed by changing phone settings. They depend on the service returning to normal.
Logging out and logging back into the account can sometimes refresh the session and fix temporary delivery sync issues.
7. When the recipient is the problem
Even when a message is sent correctly, the other person may not receive it immediately. If the recipient is offline, messages will only arrive once they reconnect to the internet. If their device storage is full, the app may delay processing new messages until space is freed.
Reinstalling the app or changing devices can also delay message sync, especially if account recovery is incomplete.
In some cases, privacy settings or blocking rules can prevent messages from being delivered even if they appear sent on the sender’s side.
If your message does not send on imo, it is usually caused by a small break in connectivity. Switching networks, briefly turning airplane mode on and off, or reopening the app can often get things moving again without much effort. If the issue keeps coming back, check for app updates or clear storage. If you’ve tried everything and it’s still stuck, the service might just be acting up, so give it a few minutes.
If the problem continues, you can contact our support team at feedback@imo.im