A method for data session establishment from a mobile device (610, 700) comprising: checking whether an identifier for a first network is on a blacklist on the mobile device (212; 312); if the first network identifier is not on the blacklist, attempting to establish a data connection with the first network (220; 320); if the attempting to establish a data connection is unsuccessful (224; 324) based on authentication: adding (226; 326) the first network identifier to the blacklist, the adding including adding identifiers of associated networks of a same radio access technology as the first network to the blacklist, the identifiers of the associated networks being derived from broadcasted information received at the mobile device (610, 700); and attempting (222; 322) data connection establishment with a second network, the second network having a different radio access technology from the first network, the first network and second network using different authentication entities, and the first network and second network being associated by utilizing at least one of a broadcast message, a provisioning message, a public land mobile network, a preferred roaming list and an extended preferred roaming list; and if the first network identifier is on the blacklist, establishing a data connection with the second network (222; 322). checking whether an identifier for a first network is on a blacklist on the mobile device (212; 312); if the first network identifier is not on the blacklist, attempting to establish a data connection with the first network (220; 320); if the attempting to establish a data connection is unsuccessful (224; 324) based on authentication: adding (226; 326) the first network identifier to the blacklist, the adding including adding identifiers of associated networks of a same radio access technology as the first network to the blacklist, the identifiers of the associated networks being derived from broadcasted information received at the mobile device (610, 700); and attempting (222; 322) data connection establishment with a second network, the second network having a different radio access technology from the first network, the first network and second network using different authentication entities, and the first network and second network being associated by utilizing at least one of a broadcast message, a provisioning message, a public land mobile network, a preferred roaming list and an extended preferred roaming list; and attempting to establish a data connection with the first network (220; 320); if the attempting to establish a data connection is unsuccessful (224; 324) based on authentication: adding (226; 326) the first network identifier to the blacklist, the adding including adding identifiers of associated networks of a same radio access technology as the first network to the blacklist, the identifiers of the associated networks being derived from broadcasted information received at the mobile device (610, 700); and attempting (222; 322) data connection establishment with a second network, the second network having a different radio access technology from the first network, the first network and second network using different authentication entities, and the first network and second network being associated by utilizing at least one of a broadcast message, a provisioning message, a public land mobile network, a preferred roaming list and an extended preferred roaming list; and adding (226; 326) the first network identifier to the blacklist, the adding including adding identifiers of associated networks of a same radio access technology as the first network to the blacklist, the identifiers of the associated networks being derived from broadcasted information received at the mobile device (610, 700); and attempting (222; 322) data connection establishment with a second network, the second network having a different radio access technology from the first network, the first network and second network using different authentication entities, and the first network and second network being associated by utilizing at least one of a broadcast message, a provisioning message, a public land mobile network, a preferred roaming list and an extended preferred roaming list; and if the first network identifier is on the blacklist, establishing a data connection with the second network (222; 322).