Should I end a friendship because I was being ignored
It depends on how they were ignoring you?
She was ignoring my texts and phone calls.
I can see that it would be frustrating if she wasn't responding to your texts and calls, but you shouldn't end a friendship just over that. Friends are supposed to talk and work through misunderstandings rather than just end the friendship for minor problems. Talk to your friend and explain how you're feeling.
Talk, talk, talk... I show my anger with words sometimes, but I'm serious about ending this friendship.
Talk is just what is needed here, honestly. I am sure there is a logical reason why she is ignoring you and she might be missing you too. It might just be the fact that she lost her phone, so you might have jumped to conclusions too quickly.