Abstract: A method for testing at least one of an inbound or an outbound roaming functionality of a first public land mobile network and a second public land mobile network includes: assigning a first Mobile Station International Subscriber Directory Number (MSISDN) as a testing number in the first public land mobile network; triggering a simulated initiation of the first MSISDN in the second public land mobile network; assigning a second MSISDN as a testing number in the first public land mobile network; activating Call Forwarding on Not Reachable (CFNRc) functionality on the first MSISDN with forwarding to the second MSISDN; forwarding a Provide Roaming Number (PRN) request for the first MSISDN to a Visitor Location Register (VLR) of the second public land mobile network; and receiving a Mobile Station Roaming Number (MSRN) from the VLR of the second public land mobile network.

Abstract: A method for testing at least one of an inbound or an outbound roaming functionality of a first public land mobile network and a second public land mobile network includes: assigning a first Mobile Station International Subscriber Directory Number (MSISDN) as a testing number in the first public land mobile network; triggering a simulated initiation of the first MSISDN in the second public land mobile network; assigning a second MSISDN as a testing number in the first public land mobile network; activating Call Forwarding on Not Reachable (CFNRc) functionality on the first MSISDN with forwarding to the second MSISDN; forwarding a Provide Roaming Number (PRN) request for the first MSISDN to a Visitor Location Register (VLR) of the second public land mobile network; and receiving a Mobile Station Roaming Number (MSRN) from the VLR of the second public land mobile network.

Abstract: A method for access authorization includes: generating, by a mobile terminal, first location data in relation to the location of the mobile terminal; comparing the first location data with stored second location data and determining that the first location data matches the second location data; establishing, by the mobile terminal, a first connection to an authorization client using a mobile communication network comprising a base station; sending, by the mobile terminal, identification data to the authorization client to request access authorization; establishing, by a detection client, a second connection to the mobile terminal, wherein the second connection is a direct packet switched connection; and granting access to a user of the mobile terminal when a position of the user relative to the detection client matches a predefined position relative to the detection client.