Yes you can call and text from abroad. Just make sure to use wifi to avoid data roaming charges.
If using your cellular data while roaming will normally result in additional charges, you may be charged extra by your mobile provider.
If using your cellular data while roaming will normally result in additional charges, you may be charged extra by your mobile provider.
You should deactivate data roaming while traveling.
To do so please go to the Settings/General/Network/Data Roaming OFF.
To do so please go to the Settings/General/Network/Data Roaming OFF.
With Wi-Fi, it is totally free.