LTE configuration as below, APIN code is a key to a SIM card, If PIN code
authentication is enabled on the inserted SIM card, enter the 4-digit PIN code
provided by your ISP to unlock the SIM card. As for APN settings, select this
option to get the APN automatically from the service provider.
Cooldia has uploaded LTE firmware at 5 June. here
LTE firmware version ALT3100_05_00_02_00_81_MS
is the latest one.
Cloud you please send me the newest lte firmware too?