FreeZone services for PC :

Navigate to (Tools>User Agent Switcher>Edit User Agent/Add new User Agent)
Put Opera Mini In Place Of name.
For User Agent String Download Attachment From below.
Save and Navigate to Url 

Put Url : airtel.in/freezone
Enjoy Google Services.

User Agent:
Opera/9.80 (J2ME/MIDP; Opera Mini/5.0.0.351 Profile/22.478; U; en) Presto/2.5.25 Version/10.54