Problem commands at Cedar

[Giusepe]

good morning
i use a mobile sony cedar to send and receive many sms from pc and it works very well.
I get an error only when I delete an address in the phonebook.
Use the command: AT + CPBW = N
The command works only if N = 1.
The problem you can solve it?

thanks

Giuseppe Miceli (Rome - Italy)

[Giusepe]

The problem is in the phone. Using a phone alcatel the problem goes away.