What company can you connect an iPhone with?
Ofcourse you can use your phone without a sim card you absolute pillock.
What company can i connect my iphone 4 from sprint ?
You can have it flashed to Boost or Virgin.
How do you remove an old WiFi setting from iPhone I have a network that I can no longer connect to but the iPhone keeps constantly asking me if I want to try to connect.?
settings -> wifi click on the arrow next to the "known" network you want to deleteclick "forget this network"
How do i amplify an open WiFi network so that I can connect to it with my iPhone with a strong signal?
Unless you have access to the wireless router itself, there isn't much you can do other than move closer to the access point. The only possible solutions would be to ask the network admin to crank ...
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Can you connect an iPhone 3G with T-Mobile?
yes you can just go to unlock att .com and after you process it you will be able to use it on any service !!