Random Read-Through to Cleanup content

I had a chance to read-through this, and some of it is no longer relevant/up-to-date. I only got through to the end of cellphone plans.

Major changes are:

* CDS/AIPT (now Cultural Vistas) -> Cultural Vistas
* I94s are online now
* Consolidated blackberry phone tips into one section
* Micro/mini sim card tips cleaned up to one section
* Typos