I recently ran out of credit on my prepaid SIM and it took me a few days to get around topping up. Meanwhile, I lost the mobile data connection. When out of a known WiFi area, the network icon was grey with a star.

So far so good.

But when I topped up, I did not get my data back, only voice and text. For three days. Switching to offline mode and back did not help, nor did restarting network in Utilities or even a reboot. The only thing that helped was a power cycle. Only then did I get a SIM card PIN prompt again and, presumably, a new registration with my provider.

Is this a known issue? To be honest, the lack of the SIM PIN prompt after going offline and on again is unsettling enough (although observed on the N900 too, perhaps another Nokia leftover), no network recovery for days after the condition that caused losing it had disappeared is downright criminal.