Galaxy S2 keeps periodically showing "Refreshing SIM data" toast I have a rooted Samsung Galaxy S2 running the stock Samsung ROM (no custom ROMs ever). 
Of late, I notice that every few minutes, a toast pops up saying 'Refreshing SIM data'. If the screen had been blanked earlier, it reactivates, and this is annoying, especially at night. 
I don't know if this is relevant, but only recently I got 3G activated (Vodafone, Bangalore,India) and it didn't happen before.

Anyone seen this, and is there a workaround or fix?

Update - Have upgraded to 2.3.5 Gingerbread and with different kernels (Ninphetamine and DarkyROM SuperCore) but it makes no difference. I wonder if it's because of the service provider.
Could it be that the SIM contacts are corroded or bent slightly, so that the phone thinks it lost connection and then regained it? If this is the case, try cleaning the contacts with alcohol.