Can I use PrivateGSM in roaming, while abroad?

PrivateGSM VoIP: Yes, but you have to be very carefull about costs. Check with your mobile operator to have a contract that allows you to control costs even if abroad. When available, use WiFi or hub-spots.

PrivateGSM CSD: Yes, but it is important to verify that the foreign country operators correctly support the GSM CSD data connection. It may be necessary to manually select the desired telephony operator. In the event that the foreign operator doesn’t support the CSD data transmission technology, it may not be possible to make secure calls abroad (calls may start and then get immediately stopped in the first few seconds of conversation).