Buy a laptop that has the "802.11a" or "802.11ac" on their specs. For example, the Intel Centrino Advanced-N 6205 has this specification: 802.11a/b/g/n. If you see the letter "a" before "b" it means it has 5 GHz capability. follow this thread for more information: https://communities.intel.com/message/220265#220265
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