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by g_p 1275 days ago
Normally not, as historically traffic from roaming users has been "home routed". That is, it was sent over a tunnel (think IPsec or similar) back to the user's home network, where it left through their usual infrastructure.

Especially in late 4G and 5G, with ideas of low latency services (that would break if you did this), there are options to route traffic into the visiting network instead. Not sure if anyone's using this though.