External antenna of clip-on type for usb modem

[dasgupta_arup]

I am using a vodafone usb modem
model is ZTE K3570z
no slot for external antenna
then found this panorama modem mate :huh:
anyone used such stuff??:S
anyone recommend something for improved reception???

 

[dasgupta_arup]

589 views.......zero replies
sigh.....
900+ views
Soon will get to 1K views without a reply
got to be some sort of record for a query