Hello All, 
Just 2 days back, I bought this LG RD6150 handset. 
I tried to connect MidcoSD memory card, but its  not detecting external card - though I tried after re-starting mobile also. 
Strange-when I remove the microSD card, its alerts that micoSD card is removed. 
Let me know if any settings are required. 
Thanks in advance. 
regards, 
sgshah