Internal Antenna Type:

PIFA Antenna: Planner Invert F Antenna (Metal Plate and Plastic Support)

FMA Antenna:  Folded Monopole Antenna (Metal Plate and Plastic Support)

FPCA: Flexible Printed Board Antenna (plastic support + FPC +Pogo pin(optional))

HDA: High Dielectric Antenna (Combination Dielectric, plastic support and Metal Plate )

LDA:  Low dielectric Antenna (metal plate and plastic support )