A wireless communication system for an aircraft , said wireless communication system comprising: at least one antenna ; a router connected to said at least one antenna , wherein the router is configured to transmit and receive wireless data communication to and from a stationary communication server outside said aircraft through at least one ground base station via said at least one antenna , wherein the router is configured to transmit and receive wireless data communication on a plurality of different frequency bands; an altitude determining unit configured to determine a current altitude of said aircraft; and wherein said router comprises a control unit operably connected to said altitude determining unit , said control unit being configured to disable wireless data communication on at least one frequency band when the current altitude is determined to be above an altitude threshold value, wherein said plurality of different frequency bands comprises: a first set of frequency bands and a second set of frequency bands , characterized in that each frequency band in said second set of frequency bands is at a higher frequency than each frequency band in said first set of frequency bands ; and that said control unit is configured to disable said wireless data communication on said second set of frequency bands , and thereby restrict said wireless data communication only to said first set of frequency bands , when the current altitude is determined to be above the altitude threshold value. at least one antenna ; a router connected to said at least one antenna , wherein the router is configured to transmit and receive wireless data communication to and from a stationary communication server outside said aircraft through at least one ground base station via said at least one antenna , wherein the router is configured to transmit and receive wireless data communication on a plurality of different frequency bands; an altitude determining unit configured to determine a current altitude of said aircraft; and wherein said router comprises a control unit operably connected to said altitude determining unit , said control unit being configured to disable wireless data communication on at least one frequency band when the current altitude is determined to be above an altitude threshold value, wherein said plurality of different frequency bands comprises: a first set of frequency bands and a second set of frequency bands , characterized in that each frequency band in said second set of frequency bands is at a higher frequency than each frequency band in said first set of frequency bands ; and that said control unit is configured to disable said wireless data communication on said second set of frequency bands , and thereby restrict said wireless data communication only to said first set of frequency bands , when the current altitude is determined to be above the altitude threshold value. a first set of frequency bands and a second set of frequency bands , characterized in that each frequency band in said second set of frequency bands is at a higher frequency than each frequency band in said first set of frequency bands ; and that said control unit is configured to disable said wireless data communication on said second set of frequency bands , and thereby restrict said wireless data communication only to said first set of frequency bands , when the current altitude is determined to be above the altitude threshold value. <EOS>