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Originally Posted by resander
The only difference between the two WLAN specs is the 'dual-band' phrase for Xperia, so I tentatively assumed this is the keyphrase that specifies that a device can handle dual bands.
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That is correct. Dual band means the device works in both bands. If it is not dual band, it will not work in both bands. However this is only one way of stating if the device can operate in the 5Ghz band.
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I am confused by the notation Wi-Fi 802.11 b/g/n in gsmarena because it includes wifi standard 802.11n. According to Wifi standards/IEEE 802.11 - Wiki.html#802.11-2007, standard 802.11n should handle both 2.4GHz and 5GHz bands
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That is incorrect. N is capable of operating in
either the 2.4Ghz band
or the 5Ghz band. It doesn't necessarily have to do both.
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So is the 'dual-band' keyphrase in gsmareana equivalent to wifi standard 802.11n or the more recent 802.11ac? or have I completely misunderstood this?
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You have slightly misunderstood this.
'N' is a set of protocols that can operate in either band.
AC is a 5Ghz only technology (or rather, it is not allowed in the 2.4Ghz band). Theoretically it could operate at 10Ghz or 60Ghz, but of the common consumer bands, 5Ghz is the only one it can use.
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Q1. are there other notations in common use that specfy that a device can handle dual band? or is there some other way of finding out except buying a device and try it?
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A/B/G/N means it can handle dual-band.
A is 5Ghz only, B is 2.4Ghz only. If it does both A and B then it does both bands, i.e. it is dual band. Similarly, AC is 5Ghz only, and G is 2.4Ghz only.
---------- Post added at 19:13 ---------- Previous post was at 19:09 ----------
Basically if it supports 5Ghz it will have either 'A' or 'AC' listed in the supported standards.
If it supports 2.4Ghz it will have either 'B' or 'G' listed in the supported standards.
Having 'N' in the list tells you nothing about supported bands.
Also bear in mind having 'N' doesn't mean it can actually do ... N. Most older 'N' phones will connect to an 'N' access point, but will not connect much faster than 'G' speeds because they lack all the additional functionality of 'N' that actually increases speeds.