Bangladesh: the iPhone users have started to enjoy the speedy service as the country code on the Apple handsets is unlocked.
In order to experience 4G, iPhone users need to update their device to the latest iOS version.
Users can know by dialing *121*3232# (Grameenphone), *123*44# (Robi) and 12151 (Banglalink) whether their SIM card is 4G.
Grameenphone users can set 4G in an iPhone set by going to Settings>Mobile data>Mobile Data Options>Voice & Data> 4G, said GP in a Facebook post recently.