A method, performed by a mobile device, of selecting a cellular network, the method comprising: activating (300, 420, 520) a cellular radio transceiver; determining (470, 530) whether, at the time of activation (300, 420, 520) of the cellular radio transceiver, a public land mobile network, PLMN, stored in a subscriber identity module, SIM, matches a home public land mobile network, HPLMN, stored in the mobile device; based on the determining (470, 530: FALSE) that, at the time of activation (300, 420) of the cellular radio transceiver, the PLMN stored in the SIM does not match the HPLMN stored in the mobile device, indicating that the user has changed the SIM from a previous SIM to a new SIM, performing scans in the following order until a usable channel is identified: scanning (310, 480, 540) a most recently used, MRU, frequency list of radiofrequency channels most recently used by the cellular radio transceiver of the mobile device, said MRU frequency list being associated with a previous SIM HPLMN; scanning (310, 480, 540) an MRU frequency list associated with a new SIM HPLMN; scanning (320, 480, 540) a stored likely frequency list pushed or pulled to the mobile device, the likely frequency list comprising radiofrequency channels available at a plurality of locations where activation of cellular radio transceivers is likely to occur, said likely frequency list being for a home network for the new SIM HPLMN; scanning (320, 480, 540) a likely frequency list for a roaming network for the new SIM HPLMN; and performing (480, 540) a full radio access technology, RAT, / band scan; and selecting the cellular network by identifying one of the radiofrequency channels as the usable channel, the usable channel being any pair of uplink and downlink frequencies over which the mobile device can communicate with a base station transceiver. activating (300, 420, 520) a cellular radio transceiver; determining (470, 530) whether, at the time of activation (300, 420, 520) of the cellular radio transceiver, a public land mobile network, PLMN, stored in a subscriber identity module, SIM, matches a home public land mobile network, HPLMN, stored in the mobile device; based on the determining (470, 530: FALSE) that, at the time of activation (300, 420) of the cellular radio transceiver, the PLMN stored in the SIM does not match the HPLMN stored in the mobile device, indicating that the user has changed the SIM from a previous SIM to a new SIM, performing scans in the following order until a usable channel is identified: scanning (310, 480, 540) a most recently used, MRU, frequency list of radiofrequency channels most recently used by the cellular radio transceiver of the mobile device, said MRU frequency list being associated with a previous SIM HPLMN; scanning (310, 480, 540) an MRU frequency list associated with a new SIM HPLMN; scanning (320, 480, 540) a stored likely frequency list pushed or pulled to the mobile device, the likely frequency list comprising radiofrequency channels available at a plurality of locations where activation of cellular radio transceivers is likely to occur, said likely frequency list being for a home network for the new SIM HPLMN; scanning (320, 480, 540) a likely frequency list for a roaming network for the new SIM HPLMN; and performing (480, 540) a full radio access technology, RAT, / band scan; and selecting the cellular network by identifying one of the radiofrequency channels as the usable channel, the usable channel being any pair of uplink and downlink frequencies over which the mobile device can communicate with a base station transceiver. scanning (310, 480, 540) a most recently used, MRU, frequency list of radiofrequency channels most recently used by the cellular radio transceiver of the mobile device, said MRU frequency list being associated with a previous SIM HPLMN; scanning (310, 480, 540) an MRU frequency list associated with a new SIM HPLMN; scanning (320, 480, 540) a stored likely frequency list pushed or pulled to the mobile device, the likely frequency list comprising radiofrequency channels available at a plurality of locations where activation of cellular radio transceivers is likely to occur, said likely frequency list being for a home network for the new SIM HPLMN; scanning (320, 480, 540) a likely frequency list for a roaming network for the new SIM HPLMN; and performing (480, 540) a full radio access technology, RAT, / band scan; and selecting the cellular network by identifying one of the radiofrequency channels as the usable channel, the usable channel being any pair of uplink and downlink frequencies over which the mobile device can communicate with a base station transceiver.