I just wanted to make sure the phone was working at your end.

Why does the phone still work when the electricity goes out?

As he quickly informed me, his phone hadn't been working for months.

"I tried to get here but the phone wasn't working."

If you try to leave that company, your phone won't work.

As a result, phones from one country may not work in other countries.

What if you do all that and the phone still doesn't work?

If the phone doesn't work for you, take it back.

If the phone doesn't work right in one combination, try the other.

The phone worked fine; he was very proud of it.