How tether your iphone 4?
Hold the home button and the lock/power button on the top for approx 10 seconds
When you tether your iphone 4 with mywi and use internet on your computer will it use up the data usage for your iphone 4?
Seeing as how the iPhone 4 requires a micro-SIM you will have to either get a new micro-SIM from Vodafone; cut your SIM down to a micro-SIM; or purchase a dual SIM adapter that will allow you to us...
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If you unlock your iPhone can you still tether?
Yes just don't accidently update
Can you tether your iPhone 4S to your laptop?
Yes, you can use your iPhone as a modem for your laptop provided it has wireless technology.
Can you tether on iPhone 3GS?
Like Magic :)