• Customizable 'Ask Before Dialing' menu
• Both extensions (Phone: 1.1.2; SMS: 1.3.2) fully tested on iOS 4.3.1

[NOTE] After installing go to Settings > Phone GV Extension and switch "Check License" to ON

Requires iOS4+
A system extension (NOT a standalone app) that seamlessly integrates GV calling capability into iPhone’s built-in Phone module. Calls via GV can be made directly from ANY apps (e.g., Phone, SMS, Contacts, Safari, Voice Control, etc.). 5 modes available: GV Direct Dial, GV Call Back, GV Offline Dial (the 2nd or 3rd with an a-list uses no minutes, plus the 3rd uses no data), Carrier, and Ask Before Dialing. Provides a Dialing Rules Editor app for advanced dialing rules editing for per-number and/or prefix setting.
Same calling experience as carrier calls in ANY apps: the real recipient caller ID’s are displayed in in-call interface & Call History v.s. random GV #’s--You get a 100% native calling experience with your GV account
Free trial for 5 days and beyond that a license is required at $2.99
For SMS counterpart see SMS GV Extension on Cydia
This will not add any icon to your home screen; you can configure some options from Settings app.

• Installation - How to install the application, Tutorial