@sakya
Unfortunately, after two sms to the same person no longer works. In conversations when I open the text message sent does not and it said "can not send to blank" (or zero - I don't remember)."

Then I sent a new message from vodafone to the same person. The sms has been confirmed, but when I open the text message says "numero non corretto" and the title of SMS is "eck: Event type RTCOM_EL_EVENTTYPE_SMS_OUTE". More you can not read.