What is the most effective method of note taking? And should I employ diverse strategies in different parts of the test? (I mean listening, speaking and integrated writing)
We discuss different methods of note-taking for TOEFL iBT within a dedicated document. You can find this document in the section Learning Center. Different students prefer different methods. So that, you would be advised to read the document thoroughly and practice with all note-taking strategies we have mentioned to see which of them will fit you best.
Can I take my iphone with me to use take notes or make correction and spelling words ?
use phone during TOEFL exam
I fear that you are not allowed to take a phone with you during the official TOEFL exam. Even the sheets of paper you will be using to take notes are provded by the test center itself.