I can help... i have incurred this problem a couple of times and understand the frustration! firstly, the reason why snd how this problem occurs is you have saved a number to your phonebook without a name and this causes the phone book to wig-out! to fix the issue simply press "1#". This will allow you to view your phone book in its speed dial order. Scroll through this menu until you find the saved number without the name and DELETE it. This will immediately bring your phone book back to normal. Good luck!
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