Phone got stuck on "SAMSUNG" logo.

[ADAMEMT360]

When my mom's phone went on the software update, this happen ...

(Phone: Samsung Galaxy A7 2017)

[FUN2000]

Try to press volume down+power button for about 15 seconds to force restart. If that doesn't work, you can try to wait for the battery to be fully discharged and restart your phone while charging.

[ADAMEMT360]

Thanks for the tips, hope that works.👍

[Luqmanakim]

You can also try to reflash the stock rom. 

If not can bring it to service center and ask them to do it for you.