Samsung Mobile Data Disconnecting After One UI 8.5? 12 Fixes

After updating to One UI 8.5, some Samsung users face mobile data disconnection issues due to changes in network settings, like APN configurations or switching 5G and LTE networks. Most issues can be fixed without resetting the phone.

Fixing Samsung Mobile Data Disconnecting After One UI 8.5

To fix disconnection problems, try restarting your phone, toggling Airplane mode, switching to LTE from 5G, and resetting your APN and network settings. These actions often restore stable mobile data connections without erasing personal data.

Restarting your phone can sometimes resolve the issue, especially if the problem started immediately after installing One UI 8.5. To restart your phone, swipe down twice to open the Quick Panel, tap the Power icon, and select Restart.

Another simple fix is to toggle Airplane mode on and off. This forces the cellular modem to disconnect and register with the network again. To do this, swipe down to open Quick Settings, wait around 20 to 30 seconds, and then wait for the phone to reconnect to the carrier.

Switching from 5G to LTE can also help resolve the issue. To do this, go to Settings > Connections > Mobile networks > Network mode, and change from a mode containing 5G to an LTE-based automatic mode. The exact options vary depending on your Galaxy model, carrier, region, and SIM.

Resetting the APN settings can also resolve the issue. To do this, go to Settings > Connections > Mobile networks > Access Point Names, and reset the APN settings. Restart the phone afterward and test mobile data again.

Resetting mobile network settings is another strong fix you can try without deleting personal files. To do this, go to Settings > General management > Reset > Reset mobile network settings, and select the appropriate SIM if your phone asks which connection you want to reset.

Other fixes include checking the correct SIM is selected for mobile data, checking data limits and data saver, removing and reinserting the SIM card, checking for another One UI 8.5 software update, testing the phone in Safe Mode, running Samsung Members mobile network diagnostics, and contacting your mobile carrier.

Before changing advanced settings, make sure the issue actually affects mobile data. Turn Wi-Fi off and check whether the 5G, 4G, LTE, or mobile network indicator disappears when the connection stops working.

It's also worth noting that a factory reset should not be your first solution for Samsung mobile data disconnecting after One UI 8.5. It erases your apps, accounts, settings, photos stored locally without backup, and other personal data.

Consider a factory reset only after network reset, APN reset, SIM testing, Safe Mode testing, carrier troubleshooting, and available software updates have failed.

Additional tips to keep Samsung mobile data stable include keeping One UI and security updates installed, avoiding unofficial APN settings, using LTE temporarily if unstable 5G coverage causes repeated switching, keeping VPN and network-modifying apps disabled during troubleshooting, and checking whether the problem happens everywhere or only in one location.

By trying these fixes, you can restore stable mobile data connections without erasing personal data.

Why Does Mobile Data Keep Disconnecting After One UI 8.5?

Mobile data depends on several components working together, including your carrier network, SIM or eSIM, APN configuration, modem firmware, Android network settings, and local signal coverage. A major One UI update can occasionally disturb one of these configurations.

Incorrect or outdated APN settings after the update, problems switching between 5G and LTE networks, corrupted mobile network configuration, temporary modem or radio software glitches, carrier provisioning problems, dual-SIM configuration conflicts, a damaged or poorly seated physical SIM card, third-party apps interfering with connectivity, and a software bug introduced by the One UI update are some of the possible causes.

Before changing advanced settings, make sure the issue actually affects mobile data. Turn Wi-Fi off and check whether the 5G, 4G, LTE, or mobile network indicator disappears when the connection stops working.

It's also worth noting that a factory reset should not be your first solution for Samsung mobile data disconnecting after One UI 8.5. It erases your apps, accounts, settings, photos stored locally without backup, and other personal data.

Consider a factory reset only after network reset, APN reset, SIM testing, Safe Mode testing, carrier troubleshooting, and available software updates have failed.

Additional tips to keep Samsung mobile data stable include keeping One UI and security updates installed, avoiding unofficial APN settings, using LTE temporarily if unstable 5G coverage causes repeated switching, keeping VPN and network-modifying apps disabled during troubleshooting, and checking whether the problem happens everywhere or only in one location.

By trying these fixes, you can restore stable mobile data connections without erasing personal data.

Additional Tips to Keep Samsung Mobile Data Stable

Keeping One UI and security updates installed, avoiding unofficial APN settings, using LTE temporarily if unstable 5G coverage causes repeated switching, keeping VPN and network-modifying apps disabled during troubleshooting, and checking whether the problem happens everywhere or only in one location are some of the additional tips to keep Samsung mobile data stable.

By following these tips, you can ensure that your Samsung mobile data remains stable and connected.

Frequently Asked Questions

Why does my Samsung mobile data keep turning off after One UI 8.5? The cause may be an incorrect APN, corrupted mobile network settings, unstable 5G connectivity, SIM provisioning, carrier coverage, or a software-related network issue. Resetting the APN and mobile network settings should usually be tried before more drastic solutions.

Will resetting network settings delete my photos? No. Resetting mobile or network settings does not delete your photos, videos, apps, or documents. Depending on the reset option available on your Galaxy device, some saved Wi-Fi, Bluetooth, and cellular configuration may need to be set up again.

Why does LTE work but 5G keeps disconnecting? This usually points toward a problem with 5G coverage, network handover, carrier configuration, or software compatibility rather than a complete failure of mobile data. You can temporarily use LTE until the issue is resolved.

Can a One UI update affect mobile network settings? Major system updates can change network components and configuration. However, a mobile data problem that appears after an update does not automatically prove the update itself is responsible, so SIM, carrier, APN, and coverage issues should still be checked.

Should I replace my SIM card? Replace the SIM only if testing indicates that it may be damaged or outdated. Try the SIM in another compatible phone first, or ask your carrier to inspect or replace it.