Compatibility:

Qi Wireless Charger

for iPhone:
for iPhone 5 --- External(need to install the Qi receiver back case)
for iPhone 4/4S --- External(need to install the Qi receiver back case)

for Samsung:
S3(9300/9308) --- External(reserved interface，need to install the Qi receiver)
Note 2 (7100/7102) --- External(reserved interface，need to install the Qi receiver)
S4 --- External(reserved interface，need to install the Qi receiver)

for Nokia:
920 --- Qi receiver built-in
928 --- Qi receiver built-in
925 --- External(reserved interface，need to install the Qi receiver)
720 --- External(reserved interface，need to install the Qi receiver)
820 --- Built-in(need to replace the battery cover)

for HTC:
Droid DNA --- Built-in
Butterfly --- Built-in
Inceredible 4G LTE --- Built-in
8X --- Built-in

for LG(google):
Nexus 4 --- Built-in

for LG:
D1L --- Built-in
LTE2 --- Built-in