contact
Mobile coverage using Oman's providers is close to flawless, but roaming can sometimes be slow. There are several Internet cafes around town, but speeds are inconsistent. Be sure to look for a place that's got broadband if Internet access is vital at the point in time. Prices vary, but are usually cheap.
cope
It's advisable for females to bring conservative clothing, especially if travelling outside the city. Nothing too major- a longish top with sleeves is adequate. When on the beach, keep a sarong handy.
Plenty of water if travelling outside the city. And sunblock.