COMECOME download says complete: choose the next action
A completed download means the browser saved the item. The next step is to inspect and open that file through Android, not to assume installation finished.
Check the selected item
Read the source, file type and relevant details in Downloads. Make sure you are selecting the completed APK you intended, rather than an older duplicate or a web page saved by mistake.
Open and review
Use the normal Android file-opening route. Read the installer identity and any source or protection message. A browser's Open control simply begins this next stage; it does not pre-approve every prompt that follows.
Confirm the final stage
After Android reports completion, open the installed app. If an account or network question appears, record it separately. Returning to the browser's completed entry and pressing it repeatedly can reopen the installer instead of helping with app access.
A useful next step
Follow the download guide from file completion through installation and first opening.
Related: The downloaded COME item has an unexpected file type