No, I never owned a OP9 but the conversion thread's OP has a Tmo modem in his conversion package. Give that a shot.Do you have the op9 modems? I'm experiencing something weird now. MSM back to stock,sim picking up as dual sim now? With?
As for the SIM strangeness... if you did flash someone else's modemst, they are not touched by MSM. You need to flash your backup back onto the device. If you didn't make a backup, you are pretty f'd, just hope it works... =/