So this is the scenario:
I am in France, using a French SIM.
My parents are in Italy and they send me an SMS.
When I send an answer the SMS is sent to the number, without the international prefix (the correct number is +39328XXXXXX but only 328XXXXXX is used as the number to send the SMS).
Android 2.3, Phone is Xperia U
A workaround is to search my parents phone number in the address book, then select send SMS, but it is very annoying.
Is there any solution to be able to reply within the SMS app, using the good phone number?
It seems that PansiSMS solves the issue, but I do not really want to install a 3rd party app.