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One special feature of these GSM+GPS systems is the Mobile Map Service which provides you with road maps, city maps, topographical maps and even nautical charts. You simply connect your GSM+GPS system to any PC with web browser, using the data cable provided with the phone. Access the Mobile Map Service with web browser, select the area and the kind of map required, and initiate downloading to your unit. The area seen on the display at once is only a fraction of the maps stored in the phone memory. The map pans automatically when you move, provided GPS is switched on. You can also zoom in and out.

Shamalat will introduce units that have a high-performance 12-channel GPS receiver, which is inherently very accurate. The U.S. DoD operating the GPS system superimposes a weak disturbing signal on the GPS satellite transmissions, called the Selective Availability (SA). The purpose of SA is to somewhat limit the accuracy of GPS service, as provided for civilian use. With SA degration on, the user typically observes an accuracy of around 50 meters.

The rechargeable battery of these units, at best, will last up to 10 days. Of course, this depends a lot on your usage of GSM and GPS, but also on the conditions you are using the phone in, such as GSM network usage, network settings, your distance to base station, the kind of SIM card you are using, and GPS satellite coverage. As a rule, the closer you are to GSM base station, and the less there are other users on the air, the longer your battery lasts. Talking draws much more current from the battery than just standing by. The GPS satellite receiver draws no current if switched off, and most current when operated continuously in poor GPS coverage, e.g. indoors or under very heavy foliage.