
Hello dielectra,
Welcome to the Microsoft Community.
I understand that you are experiencing issues with Excel for Android and have tried many solutions.
I noticed that you haven't attempted any network-related troubleshooting yet, and this problem could also be a temporary issue caused by network or server fluctuations.
I recommend checking whether you have enabled VPN or other network tools. If so, please turn them off.
Please try switching to a different network, preferably from another service provider, to see if the issue persists.
If the problem remains after network troubleshooting, it might be an issue with the Excel for Android application. In that case, I suggest providing us with your phone's system version and the Excel app version details so I can escalate the issue. You can also report this problem through the feedback feature in any Office app—the more feedback we receive, the faster this issue can be resolved.
If you can't check the app version within Excel, please try finding it in your phone's system settings under the app list.
I hope this information helps. If you have any updates, feel free to let me know—I’ll be here to help.
Best regards,
Ian | Microsoft Community Support Specialist