Android Hotspot stopped working

[Android Question]

Device: Samsung Galaxy S2
Carrier: Bell

Background: I have been using my Android Hotspot on the go for well over a year for my tablet and occasionally for my laptop. Whenever coffee shops have had a bad wifi signal I have tethered onto my phone's internet wirelessly. One day, it stopped working. I did not alter any settings.
On the phone itself I can do web searches, etc.

Question: Would it be the phone that's malfunctioning or is this one of the first signs that the battery is starting to die?

 

[Rukbat]

If the battery were starting to go, the GPS would probably be the first thing to fail. The phone itself (making and receiving calls) would probably be the second. Try a hotspot app and see if that gives you back your hotspot capability. If it does, I wouldn't worry about it unless the phone was under an extended warranty with a really small deductible.