The Nigerian Communications Commission (NCC) has introduced a USSD code, *315#, that enables phone owners to check whether their devices are approved for use on Nigerian networks. The move follows warning SMS messages the commission began sending to some users under the sender ID "NCC-Checker". The messages say the handset is not verified for use on Nigerian mobile networks and advise recipients to contact their seller or dial 315. The check is part of the NCC's Device Management System (DMS), which uses a phone's International Mobile Equipment Identity (IMEI) number to identify...