There are 6 variants on LG V40 in the USA based on different carriers. The secret codes vary from carrier to carrier.
The LG V40 models in the US are AT&T LM-V405UA1, Sprint LMV405UA3, T-Mobile V405TA, Verizon V405UAB, U.S Cellular V405UA0 & Factory Unlocked lm-v405qa
Let’s check out the dialer codes for all the V40 variants starting with the AT&T version –
LG V40 Secret Codes AT&T V405UA1
There are 5 working dialer codes for the V40 AT&T –
To enter a secret code, we need to launch the phone dialer located on the LG V40 Home screen.