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I am developing a peripheral that uses WiFi and Embedded browser, the peripheral looks like an access point to iPhone but it is not connected to internet. When I connect my phone to this peripheral via Wifi, I loose internet connection on the phone using 3G.

Is there a way to avoid this? I have control over the software of the peripheral so I can change the IP addresses, gateways etc.

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closed as not a real question by bmike Nov 9 '12 at 16:45

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

Not only are both answers incorrect - the iOS maintains cellular and Wi-Fi connections as can be easily observed with a free app called netstat, this is basically a programming question and not a user level question. Try to get extra details on the programming of the peripheral and re-ask this on if you have more programming questions. We could also edit this to be about how a user might use the peripheral if you add more details but the question is too unspecific to be answerable. – bmike Nov 9 '12 at 16:45

No, you need to disable the WiFi in order to use the 3G network.

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No, you can't. If an iPhone is connected to a WiFi network it won't use 3G anymore, even if your WiFi is not connected to the Internet.

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