Phones You will not be allowed to take a mobile phone or GPS from outside the country into North Korea. If you do bring one in, it will be wrapped in packing tape and signed by a customs officer on entry. When you leave, it will be unwrapped and given back to you.
International calling is generally possible from hotels, though it is expensive (€4-5 per minute) and all calls are likely to be recorded and monitored.
Internet Internet facilities are limited. Most of the larger hotels provide internet access, but this needs to be applied for some days in advance. If you do need it, advise your tour guide of your requirement well ahead of time so that access can be arranged. Public internet cafes do not exist nor business centers with web access in the hotels and many websites are blocked by an international firewall.