UniFi 100mbps on 2.4GHz wifi.
In summary, for 2.4GHz to go 100mbps or higher, you'll need:
1. Good signal strength
2. Low interference
3. If single chain (1x1), 40MHz channel width.
4. If 20MHz channel width, dual chain (2x2)
*3 & 4 on both your devices and your wifi router.
Router: Mikrotik RB750Gr3
AP: Mikrotik hAP AC Lite

Toshiba Portege z930 2012. 2.4Ghz, single chain, 40Mhz channel width, SGI (short guard interval). Link speed: 150mbps.

MacBook Pro Retina 15" 2013. 2.4Ghz, dual chain, 20Mhz channel width, SGI. Link speed: 144mbps.
Can't get my iPhone 6s to go any higher than 92mbps.

iPhone 6s. 2.4Ghz, dual chain, 20Mhz channel width, SGI. Link speed: 144mbps.

Radio environment.
Notes:
hAP AC Lite is 100mbps ethernet ports only. In order to go above 100mbps, I bonded 2 ports to my RB750Gr3.
This post has been edited by soonwai: Jan 2 2018, 04:46 PM