I have tried to set of the sim card in the unit, it appears that the card does not seat properly in the mount. This needs to be fixed . Also, while removing the memory card 16GB and replacing, it fell into the unit !!! How the hell this happned I don't know. It looks like there is a gap between the card slot and the inside of the unit. I can hear it in the unit when trying to shake it out. There's no way to try and retrieve it other thqn sending the unit back. The unit was off when both the cards were taken out. I will need an RMA to get this fixed.