Wifi frequency not getting reduced in phone

I have downloaded the boltiot app in my mobile but my wifi frequency in mobile cant be brought down to 2.4 GHz which is recommended for the bolt iot device. What should I do?

step1- goto wifi hotspot
step2- click on set up wifi hotspot
step3 - uncheck if check on share via connected wifi if not show i your phone ignore this step
step4- click on show advance option
step5- click on 2.4GHz shown below and then save

if there is no option to change GHz of wifi then use your friends mobile phone to connect bolt to cloud .After blinking green light then you use your phone . it work …