From your link above (see quote below), you may have to keep doing this for any other sim you plan on using in the phone.

No, you do not need texting plan to be able to receive/send text. Something else may be wrong. How are you sure the text actually got sent?

"One user has reported that this is not a true unlock. The phone will be unlocked for that SIM in addition to the original carrier. For instance, if it's Cingular locked and you perform these steps with a T-Mobile SIM, you can use either of those two. If you then try to use e.g. a Rogers SIM, it won't work unless you perform these steps with the Rogers SIM, after which the T-Mobile SIM will not work."



[QUOTE

=SeAAttle;11645483]This seems to have worked. After steps 1-8, I turned the phone back on and it uses the TIM SIM card. Was never prompted for the unlock code, however.

Also not asked for unlock code using other methods suggested here. When we bought the SIM card here in Italy, we were told that to call a US number, we did not need the country code. That is not correct. I have my iPhone here (locked) and can call it on the Samsung only by using the 011 prefix.

Next problem: tried sending a text to my iPhone from the (now working) Samsung. Message sent but not received. Do I need the ATT international plan for texting?

Thanks for all of the suggestions.[/QUOTE]