Since downloading the last map update [10.60] the GPRS connection fails when device is in the windscreen mount. Here's the kicker, it connects fine when left on passenger seat on internal power, but then put it in the mount within a minute or two loses connection again. Take it off the mount and wake it up again guess what GPRS works again. And I haven't even moved. Seem odd this problem started after a Tomtom update! With the latest model not having have an internal Sim option just makes me wonder.