A phone stuck on the boot screen, often referred to as a 'boot loop,' usually indicates software issues or corrupt system updates. First, try a simple hard reset by holding down the power and volume down buttons simultaneously. If this doesn’t work, try booting the phone into Safe Mode (typically done by holding the power button and selecting 'Safe Mode' if available), which can help bypass faulty apps. Should Safe Mode work, uninstall recent apps or updates that may be causing the problem. Another option is booting into Recovery Mode (often accessed by holding down specific button combinations) to clear the cache partition. This doesn’t delete your data but can remove temporary files causing issues. If the problem persists, consider a factory reset through Recovery Mode, but back up your data first. If nothing works, the phone may require a firmware reinstall, which can be done through official support or specialized tools.