I am using Redmi 4 Prime (http://www.gsmarena.com/xiaomi_redmi_4_prime-8263.php) on Global Rom When i change Location to Malaysia/India it shows Volte Option under network settings, When i Turn on Volte nothing happens and no Volte logo. Please help
Yes, I am unable to use Volte (4G HD Voice) when using Starhub 4G Post paid and using Volte Supported handset with Volte option switched on, when placing and receing calls handset always switch to 3G network, no mater Volte is on or off.
Does your phone display the “4G” or “LTE” icon while making a call? If it is then, it's considered a HD Voice+ call which is the same as VoLTE. Separately, coverage and speeds may differ from location to location due (and not limited) to blind spots or other factors. As such, it's advisable to make calls in an open area. - Sofia
Normally it is 4g , when making the call it changes to 3g , even after Volte enabled in handset , That's the problem . I tried in different locations.