If the judge allows you to bring a cell phone to the courtroom, it must be turned off. If the judge does not allow it, you may ask for special consideration of this rule if appropriate circumstances exist, such as if a family member's medical needs require you to remain in close contact. You must give such information to the judge and/or the clerk prior to the beginning of the trial.
You may not take a cell phone into the jury room during deliberations.
No. After a verdict is rendered, you are not required to speak with any of the attorneys, parties, or witnesses. However, you are not prohibited from doing so. You may also speak with the judge or the clerk if you feel there is a need.
No. You must base your verdict only upon the evidence that is presented and admitted in court. You should never independently visit a place mentioned in the case or attempt to investigate any aspect of it.