Why can’t my phone use 4G LTE connectivity, even though it supports 4G LTE?

You may have set your phone to use only 3G connection, try changing it to 4G at; Settings -- Mobile Networks -- Preferred Network Type. Your SIM might not support 4G

services, please request a new replacement SIM card from your service provider. You might be out of coverage area of your 4G services, please contact your carrier

for more information.