All TelCos in all countries have backup of the SMS messages. The key part is for how long and what details. In the US, for example AT&T is only a couple of da

All TelCos in all countries have backup of the SMS messages. The key part is for how long and what details. In the US, for example AT&T is only a couple of days; Verizon, 3-10 days for SMS contents. Everything else like subscriber info, call history, tower location, tower dumps, range-to-tower can be years. In EU similar patchwork. (source: me half century in field)