Do international roaming mobile phones send videos through foreign gateways?

Mobile phones roaming internationally send videos through foreign gateways.

International roaming means that users can also enjoy a series of services provided by telecom operators abroad, such as phone calls, short messages, multimedia messages, mobile Internet access and so on. At present, when mobile phones roam internationally, they usually use CDMA or GSM(WCDMA) networks in roaming places.

The Global System for Mobile Communications, known as GSM, is the most widely used mobile phone standard at present. More than 6,543.8 billion people in more than 200 countries and regions around the world are using GSM mobile phones. The ubiquity of GSM standard makes it common for users to roam internationally after signing a "roaming agreement" between mobile phone operators. Compared with its previous standard, the biggest difference is that its signaling and voice channels are digital, so GSM is regarded as the second generation (2G) mobile phone system. This shows that digital communication has been established in the system for a long time. GSM is an open standard currently developed by 3GPP.