I am having the Nokia E5 and I am currently having the reboot problem with my phone. My difficulty is that cell phone keeps on restarting itself exclusive of some cause. Once it restarted then after a few minutes it repeated the same. Sometime it happens during the calls. This series is repeats itself. So can you let me know that is there some method by which this matter can be solved? The keypad as well becomes immobile and I cannot accomplish anything by means of those buttons. I do not desire to lose the phone since I like this too much. Please give your proposal about this matter. Thank you so much for reading as well as replying to this question in advance.