(If you looking for Samsung Galaxy Tab 10.1 4G LTE User Guide for Verizon, just go here) Although Samsung do had a plan on releasing the Samsung Galaxy Tab 10.1 which supports Wi-Fi plus 3G Data Networks (bundling with Carrier), right now, in United State US, there is only Samsung Galaxy Tab 10.1 Wi-Fi Only without GSM / CDMA Technology (3G or 4G) is available. This also means that this Galaxy Tab 10.1 (Tablet) is not supports for Data Networks voice communication and also for messaging via SMS or MMS.
That is why you’ll never found a SIM Card Slot on this Galaxy Tab 10.1 (which has a GT P7510 series name). By this, in the User Manual / User Guide of this Tablet, you wouldn’t find any tutorial that would guide you how to insert the SIM Card, so do how to Installing the external memory card. Yup, this Galaxy Tab 10.1 GT P7510 isn’t supports microSD Card (do not had Card Slot). This means that there is no instructions manual how you can install and insert the microSD card to the body of Galaxy Tab Tablet.