I just got a LT18 and I changed successfully his "personality" to match my phone. After activating the Visible SIM on the phone, I tried everything possible combination of settings (TTL/APN/etc) on the LT18 without luck : I'm getting RED LED for both the 4G and 4g signal on the LT18. However if I put my Verizon SIM, it works like a champ!!!

FYI I updated to latest firmware on LT18. Anyone can help make my LT18 recognize the VISIBLE SIM? Again it works perfect on my phone. Quite frustrating

Thanks!