You can call using TextMe from anywhere!
Just make sure to use wifi to avoid data roaming charges.
Using your cellular while abroad will generally cause additional charges by your mobile provider.
You should deactivate data roaming while traveling. To do so, go to...
- Your phone's Settings
- Tap on Cellular
- Tap on Cellular Data Options
- Then make sure Data Roaming is turned off
With Wi-Fi, it is totally free!