More bandwidth on the 5GHz signal

its a hardware limitation, not the internet speed limitations

me on 2.4GHz in a 30mbps unifi getting 7 mbps only, while on 5ghz get 28 mbps

5 ghz is a short range firing wireless network, while 2.4ghz is more extensive

the wifi speed itself, and "maybe" the iphone, you can read up on theoretical speed of N and AC wifi

Nothing to do with the matter at hand
Because iPhone 7 & 6s support Wireless AC
iPhone 5 only supports Wireless N

to be more specific is hardware technology limitation

2.4ghz can reach so far as 300mbps but you aint going to get that full speed.

Lets factor in the bandwidth, the width of 2.4ghz wireless-n is 40mhz and while 5ghz width have 80mhz which double up the so call "highway" to allow more data to be transmitted. This effectively explain why there is so much different on 2.4ghz & 5ghz.

The fibre internet speed in singapore is hitting way over what 2.4ghz wireless can do.

In malaysia....only TIME fibre are doing that. Meanwhile if you are on unifi forget about it, majority unifi user are still stuck on below 50mbps

as mention you will not get 300mbps fully outta of 2.4ghz

is shared and not all wireless-N standard can give you that

Again, it doesn't have anything to do with how many user is at home, so stop repeating that

You need to check the maximum Wi-Fi speed of your devices
Most mobile phones & tablets is limited to 72Mb/s when on 2.4Ghz

Mobile phone with single stream wifi n 2.4Ghz you cant reach 100Mbps...tested with Galaxy S6, iphone 6 and iphone 7 plus on unifi 100Mbps(Router Archer C2600 ) and Time 300Mbps(Router RT-AC68U and Archer C2600). Both Unifi and Time only can get 80++Mbps sometime 90++Mbps on 2.4Ghz. But on AC 5Ghz easily to get 300Mbps.

It's all about hardware limitation, I am using TIME Fibre 500mbps & Asus RT-AC3200.

For 2.4GHz, my phone can get 100mbps (up and down) in average but my old laptop is only able to get max 60mbps (up and down), both tested just beside my router.

the 2.4ghz and 5ghz not the problem here, 5ghz support wireless N too
the 5ghz support higher bandwidth at shorter distance only, but at last u have to refer to the wifi N and AC
and what the picture show i also a theory speed only not real life benchmark usage speed

iphone 5 only support single stream (1x1:1). Iphone 6&7 are dual stream (2x2:2)
Link:
https://wikidevi.com/wiki/Broadcom

that's why anyone who has internet connection 20mbps above needs 5Ghz WiFi AC instead of slow 2.4Ghz N

2,4Ghz N only can achieve high speed when signal is above 80%,

also why many ppl complaint unifi 30 or above dont have actual package speed especially on wifi

tm always give lasap d-link wireless N 2.4Ghz router

if internet over 100Mbps, u must have Gigabit LAN over cables or Wifi AC/AD 5Ghz standard

* and take note Wireless N also got 5Ghz but doesnt mean it is faster than 2.4Ghz N, same IMO

Bear in mind that the wifi standard used for iphone 5 is only standard n, and it does not support MIMO technology.
And also the processor of the phone matters too. If you compare iPhone 5s and iPhone 5c, which share the similar if not same wifi configuration and controller chip, running wifi Speedtest on 5Ghz wifi network on both phones and you will realise iPhone 5s can score slightly better than 5c.