Time will be your major problem on this test. I worked on the exam literally to the last second of regulation time. However, the last few problems were ones I had skipped.
My advice is to flip through the whole exam booklet and if possible quickly read each problem. I spend the first 6 minutes reading all the problems. I noticed that the wordy/long-stated problems are the easier ones to get, because they gave alot of superfluous data. The toughest questions were the one line questions.
Spend only 5-6 minutes on each question, if you can't get it in two or three tries move on to the next question. My brain was sub-consciously working on the problems I skipped. So sometimes when I came back to a problem, I got it within a minute. If there is a problem where you are consistently getting the wrong answer even though you think you have done it right, check what units they want the answer in. In my first iteration I had skipped 5-8 questions, and then came back and answered all but 3. The three I had to take an educated guess.
Draw a free-body diagram always!!!
As for cell-phones, they will make a general announcement before the test begins and you have the oppurtunity to give the cell phone to the procter, which will be on their desk. No harm there, just don't keep it on yourself. In pittsburgh, everyone was well staffed and genial.
You have to be in the mindset of getting all question right, don't worry about the cut-score. You will mostly likely make a lot more silly mistakes than you realize. You exact answer should be close to the answer choices, in most cases.
Based on the comments on this board, I think you guys are well prepared. Right after you leave the exam room, you should have a good idea if you passed. I kinda new i passed but as you wait for weeks, that confidence will decline. So remember how you feel right when you leave the exam room.
Oh, also note that they will close down this board Thursday/Friday. They did it last October, so if you have any last minute questions ask now!
Or else Good Luck, and enjoy the experience.