a wireless portable communication device receives an up - to - date authentication credentials required for a common data application in a wireless communication network in which the wireless portable communication device is currently registered . the up - to - date authentication credentials may include a list of a plurality of wireless communication networks mapped against the up - to - date authentication credentials . the wireless portable communication device may receive the up - to - date authentication credentials periodically at a predetermined interval , based upon a predetermined condition , or by requesting the up - to - date authentication credentials . the up - to - date authentication credentials are then prioritized over existing authentication credentials , and are used for the common data application in the wireless communication network in which the wireless portable communication device is currently registered . the wireless communication network , which requires authentication credentials for the common data application , keeps the required authentication credentials up to date , and transmits the up - to - date authorization credentials periodically at a predetermined interval , based upon a predetermined condition , or in response to receiving a request for the up - to - date authentication credentials . the wireless communication network allows the wireless portable communication device having the up - to - date authentication credentials a use of the common data application . fig1 is an exemplary environment 100 in which a wireless portable communication device 102 in accordance with at least one of the preferred embodiments may be practiced . the wireless portable communication device 102 is presently shown to be located in a first coverage area 104 supported by a first wireless communication network 106 , which is adjacent to a second coverage area 108 supported by a second wireless communication network 110 . the wireless portable communication device 102 has default authentication credentials for a common data application such as an e - mail application , which is maintained in a common service 112 , accessed through the first wireless communication network 106 . while the wireless portable communication device 102 is within the first coverage area 104 and is registered to the first wireless communication network 106 , the wireless portable communication device 102 , having the default authentication credentials fully compatible with the first wireless communication network 106 , properly accesses the common data application . however , as the wireless portable communication device 102 moves from the first coverage area 104 to the second coverage area 108 and re - registers to the second wireless communication network 110 , the default authentication credentials of the wireless portable communication device 102 may not be compatible to access the common data application in the second wireless communication network 110 . for an exemplary case where the user is permanently changing his subscription to the operator of the wireless communication network 110 , the wireless portable communication device 102 therefore needs to able to update the default authentication credentials to new authentication credentials that are compatible in the second wireless communication network 110 before being able to properly access the common data application . further , the first wireless communication network 106 may change the default authentication credentials from time to time , and may cause the wireless portable communication device 102 to fail to access the common data application properly . therefore , the wireless portable communication device 102 needs to be able to maintain up - to - date authentication credentials . fig2 is an exemplary flowchart 200 illustrating a process in the wireless portable communication device 102 for maintaining up - to - date authorization credentials for accessing the common data application in accordance with at least one of the preferred embodiments . the wireless portable communication device 102 has default authentication credentials required for the common data application in a default service network , which is the first wireless communication network 106 . the process begins in block 202 , and the wireless portable communication device 102 receives a data session configuration file , which includes authentication credentials in block 204 . the wireless portable communication device 102 may typically receive the data session configuration file wirelessly from the current wireless communication network , but it may alternatively receive the data session configuration file by downloading from the internet . the data session configuration file may further include a list of a plurality of service networks mapped against the received authentication credentials for use with the common data application . this plurality applies as the user subscriptions to a plurality of wireless network operators change . the wireless portable communication device 102 may receive the data session configuration file based upon various conditions . the wireless portable communication device 102 may transmit a request to receive the data session configuration file , or may receive the data session configuration file based upon a predetermined condition . for example , the wireless portable communication device 102 may receive the data session configuration file upon registering to the current service network using a common registration channel , upon failing to properly access the common data application in the current service network , or upon roaming from the default service network to the current service network . the wireless portable communication device 102 may also autonomously receive the data session configuration file periodically . the wireless portable communication device 102 may further determine the compatibility associated with the wireless portable communication device 102 , a subscriber identity module in the wireless portable communication device 102 , and the current wireless communication network , and may receive the data session configuration file based upon the compatibility . the subscriber identity module may be one of a subscriber identity module (“ sim ”) used in networks based upon global system for mobile communications (“ gsm ”), a removable user identification module (“ r - uim ”) used in networks based upon code division multiple access (“ cdma ”), or any other similar subscriber identification module . in block 206 , the wireless portable communication device 102 prioritizes the authentication credentials between the default authentication credentials and the received authentication credentials . for example , as previously shown in fig1 , when the wireless portable communication device 102 receives new authentication credentials as a result of moving from the first wireless communication network 106 to the second wireless communication network 110 requiring the new authorization credentials to access the common data application , the new received authorization credentials are prioritized over the default authorization credentials . once prioritized , the default authentication credentials may be overwritten with the received authentication credentials , making the received authentication credentials as new default authentication credentials . alternatively , both the default authentication credentials and the received authentication credentials are stored in the wireless portable communication device 102 , and may be available for later usage . in block 208 , the wireless portable communication device 102 uses the authentication credentials having higher priority for the common data application in the current service network . the authorization credentials may be re - prioritized when the wireless portable communication device 102 moves back to the first wireless communication network 106 . the process then ends in block 210 . fig3 is an exemplary block diagram 300 of the wireless portable communication device 102 configured to maintain appropriate authentication credentials required for the common data application in the current service network in accordance with at least one of the preferred embodiments . a battery , a display , a keypad , a speaker , a microphone , an antenna , and other normally associated components are understood to be present but are not specifically shown with the wireless portable communication device 102 for simplicity . the wireless portable communication device 102 has in memory 302 default authentication credentials , which are required for the common data application in a default service network , such as the first wireless communication network 104 . the wireless portable communication device 102 has a configuration file receiver 304 , which is configured to receive a data session configuration file . the data session configuration file includes authentication credentials , and may further include a list of a plurality of service network mapped against the received authentication credentials for use with the common data application . a prioritization module 306 is coupled to the configuration file receiver 304 and to the memory 302 , and is configured to prioritize between the default authentication credentials and the received authentication credentials . a credential selector 308 is coupled to the prioritization module 306 , and is configured to select the authentication credentials having higher priority for the common data application in the current service provider . a credential transmitter 310 is coupled to the credential selector 308 , and is configured to transmit the selected authorization credentials for the common data application in the current service network . the wireless portable communication device 102 may further have a request transmitter 312 , which is coupled to the configuration file receiver 304 and is configured to transmit a request to receive the data session configuration file . the memory 302 may be further coupled to the credential selector 308 , and be further configured to be overwritten with the authentication credentials selected by the credential selector 308 . the memory 302 may comprise volatile and non - volatile memory modules , having the default authentication credentials programmed in the non - volatile memory module and having the received authentication credentials in the volatile memory module . the wireless portable communication device 102 , specifically the configuration file receiver 304 , may be further configured to receive the data session configuration file based upon various predetermined conditions . for example , the configuration file receiver 304 may be configured to receive the data session configuration file upon registration of the wireless portable communication device 102 to the current service provider using a common registration channel , upon failure of the wireless portable communication device 102 to properly access the common data application in the current service provider , or upon the wireless portable communication device 102 roaming from the default service network to the current service network . the configuration file receiver 304 may be further configured to autonomously receive the data session configuration periodically . further , the bearer path may be entirely independent from the wireless network for receipt of the configuration file , for example , it may be downloaded off of the internet to the wireless portable communication device 102 . the wireless portable communication device 102 may further comprise a subscriber identity module 314 such as a subscriber identity module (“ sim ”) used in networks based upon global system for mobile communications (“ gsm ”) and a removable user identification module (“ r - uim ”) used in networks based upon code division multiple access (“ cdma ”) or via the service programming implemented directly on the wireless portable communication device 102 where no r - uim is present . the subscriber identity module 314 is coupled to the credential selector 308 , and is configured to provide information to the current service network , such as the first wireless communication network 106 regarding the identity of a subscriber and associated services . although typically a wireless portable communication device and its subscriber identity module are associated with the same wireless communication network provider , because the subscriber identity module is fully or partially compatible with similar wireless portable communication devices , the subscriber identity module associated with one wireless communication service provider may be used with a wireless portable communication device associated with another wireless communication service provider . further , as a result of roaming or user subscription changes to other operators , such a combination of the wireless portable communication device and the subscriber identity module may register and operate in yet another wireless communication service provider &# 39 ; s network . the configuration file receiver 304 may further be configured receive the data session configuration file based upon the compatibility among the wireless portable communication device 102 , the subscriber identity module 314 , and the current wireless communication network . fig4 is an exemplary flowchart 400 illustrating a process in the wireless communication network 106 for providing current authentication credentials required for the common data application accessible through the wireless communication network 106 in accordance with at least one of the preferred embodiments . the first wireless communication network 106 is simply referred as the wireless communication network 106 for this illustration . the process begins in block 402 , and the wireless communication network 106 maintains the current , or up - to - date , authentication credentials indicative of currently required authentication credentials for the common data application in block 404 . the wireless communication network 106 may maintain the current authentication credentials in various ways including , but not limited to , acquiring the current authentication credentials by communicating with common data service 112 periodically , and receiving the current authentication credentials from the common data service 112 as they are updated . the wireless communication network 106 then detects a predetermined condition for transmitting a data session configuration file in block 406 . alternatively , the common data service 112 may detect the predetermined condition through the wireless communication network 106 . the data session configuration file includes the current authentication credentials , and may further include a list of a plurality of wireless communication networks mapped against the appropriate authentication credentials for use with the common data application . the predetermined condition to be detected in block 406 for transmitting the data session configuration may be one of various predetermined conditions including , but not limited to , receiving a request for the data session configuration file , receiving a registration of a wireless portable communication device using a common registration channel , determining a registered wireless portable communication device failing to properly access the common data application , and reaching a predetermined periodic transmission time interval . as one of the predetermined conditions , the wireless communication network 106 , or the common data service 112 , may further determine the compatibility associated with a wireless portable communication device registered in the wireless communication network 106 , such as the wireless portable communication device 102 , a subscriber identity module in the wireless portable communication device 102 , and the wireless communication network 106 itself . the subscriber identity module may be one of a subscriber identity module (“ sim ”) used in networks based upon global system for mobile communications (“ gsm ”), a removable user identification module (“ r - uim ”) used in networks based upon code division multiple access (“ cdma ”), or any other similar subscriber identification module . upon detecting one of the predetermined conditions in block 406 , the wireless communication network 106 , or the common data service 112 , transmits the data session configuration file in block 408 , generally only to the wireless portable communication device 102 , which triggered the predetermined condition detection process . alternatively , the wireless communication network 106 , or the common data service 112 , may broadcast the data session configuration file periodically to all wireless portable communication devices currently registered to the wireless communication network 106 . upon receiving the current authentication credentials from the wireless portable communication device 102 in block 410 , the wireless communication network 106 allows the wireless portable communication device 102 proper access to the common data application in block 412 . the process then terminates in block 414 . while the preferred embodiments of the invention have been illustrated and described , it is to be understood that the invention is not so limited . numerous modifications , changes , variations , substitutions and equivalents will occur to those skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims .