Is this 1st time that she is blew up at you? or is this the
dunno how many times le? If its the 1st time, maybe wait for her to
cool down before you msg her. As you said the phone means a lot to
her, maybe she really was upset. But if she is always behaving like
this, I think its time for you to rethink if you still want to be
with her. All people in the world have a limit to how much you can
take it, once you breach the limit, then it will be hard to go
back.
So what if you got a degree in sg? You take a walk to orchard and
throw a stone, percentage of hitting a degree holder (local or
overseas) is very high. If she think that since she is a degree
holder and is high up in the ladder, den dump her. This type of
girls are only waiting to marry into a rich family and be a full
time tai tai. Btw, r u rich? maybe thats why she is with you? jus
joking 
Break or wait, its up to you. But if she always blew up on me, I
will let her go. Cos its better for a person to be sad then 2
person, if she will be sad.
Just my 2 cents worth
