If they arrest you they can send your phone in for analysis. The Cellebrite they use will pick up your browsing history, call logs, SMSs, etc. It'll even recover everything you've deleted off the device and identify which towers your device was connected to.They have been doing it for years. Even your calls are listened to and SMSes you send can be read if you find yourself in court for a crime you allegedly committed!
Why do you think cellphones sold in SA have Icasa logo on them :crylaugh: :crylaugh: ...How do you think they know Oscar Pistorious visited porn sites on the night he killed Reeva...
Cell C does it, MTN does it, Virgin does it - it is a regulatory requirement to operate as a network provider. All countries do it.
They can do a 205 and request your call logs from the network provider as this will give all the call logs for that number, so they can see if you made calls with a different device (and that device's IMEI - and all the other sim cards that have been used on that device).
I don't believe they would've pick up that Oscar Pistorius was browsing porn on the night he killed Reeva from the network provider. That will be easily picked up from the Cellebrite.