Como obter o código IMEI gratuitamente em dispositivos LG

LG Optimus T LG Optimus T
LG Optimus S LG Optimus S
LG Optimus M LG Optimus M
LG Octane LG Octane
LG Optimus Chic E720 LG Optimus Chic E720
LG Town C300 LG Town C300
LG E900 Optimus 7 LG E900 Optimus 7
LG C900 Optimus 7Q LG C900 Optimus 7Q
LG Quantum LG Quantum
LG GS390 Prime LG GS390 Prime
LG GT550 Encore LG GT550 Encore
LG C320 InTouch Lady LG C320 InTouch Lady
LG Vortex VS660 LG Vortex VS660
LG Cosmos Touch VN270 LG Cosmos Touch VN270
LG Apex LG Apex
LG Axis LG Axis
LG P520 LG P520
LG P525 LG P525
LG S310 LG S310
LG A155 LG A155