1)Tap to launch Settings from your SpringBoard. 2)Choose General from the Settings menu. 3)Scroll down and select Reset from the General menu. 4)Tap the Reset Network Settings button, then press the Reset Network Settings button that appears below. Your iPhone will now reboot with the factory default network settings.
In iOS, there are a number of reset options for your iPhone or iPad. They all function differently and there are different scenarios for why you might use one versus another. In this guide, we’ll present all of the reset settings on iPhone and iPad, what they do and when to use them.  1 Restart your iPhone or iPad. 2  Check for a Carrier Settings Update. 3  Take out the SIM card and then put it back in. 4  If the SIM card is damaged, or doesn't fit in the SIM tray, contact your carrier. 5  If you have another device, see if you can connect your carrier's network with it in that location. 1 Check for a Carrier Settings Update. 2  Take out the SIM card and then put it back in. 3 1 Check your coverage area to make sure that you're in an area with cellular network coverage. 2  Restart your iPhone or iPad. 3  Check for a Carrier Settings Update. 4  Take out the SIM card and then put it back in. 5  If the SIM card is damaged, or doesn't fit in the SIM tray, contact your carrier. 1 Check for a Carrier Settings Update. 2  Take out the SIM card and then put it back in. 3 So, it will reset your network connection options, and it will affect internet connectivity, both GSM/GPRS/EDGE/3G/4G and WiFi, but it shouldn't impact classic telephone services, because they are usually auto-configured by the carrier and do not require specific settings on the mobile phone. I've read advice online to do on the iPhone, but I can only find very vague information on what this actually does. From the name it sounds like a bit of a nuclear option, and before I try it I want to make sure that it's not going to affect my ability to use the cellular network. You may want to do this if you are experience problems with your network connections. Step One. Tap to launch Settings from your SpringBoard. Step Two. Choose General from the Settings menu. Step Three. Scroll down and select Reset from the General menu. Step Four. Tap the Reset Network Settings button, then press the Reset Network Settings button that appears below. Your iPhone will now reboot with the factory default network settings. Please follow iClarified on Twitter, Facebook, Google+ , or RSS for more Apple news, videos, and tutorials Process. Before you do a reset on your iPhone, do a “sync” to iCloud or your PC to protect your data. Plug your iPhone into a charger and make sure the battery has a full charge. You reset your iPhone through its “Settings” app. When you tap “General,” the iPhone displays a long screen of options; the “Reset” option is at the very bottom. Tap it and you see a list of different reset operations. You can use iTunes on Windows or OS X to back up the iPhone to your computer. If you want to delete everything on your iPhone and start over again, here's how. 1. Open Settings. 2. Tap General. 3. Tap Reset. Reset is located at the bottom of the General settings screen. 4. Tap Erase All Content and Settings. If your phone is protected with a passcode, you will be prompted to enter it.  take a look at this link reset network settings http://www.apple.com/support/iphone/assistant/wifi/#section_5. My bad, it doesn't really give you the details that you were looking for. For wifi-you would have to reenter the password. I'm not sure about celluar data.  Scroll down the General settings to the bottom and tap Reset.. Tap the Reset Network Settings option, then tap it again to confirm. Your iPhone should shut down for a few seconds, reset your network settings, and restart automatically.  1 Take out the SIM card and then put it back in. 2  If the SIM card is damaged, or doesn't fit in the SIM tray, contact your carrier. 3  If you have another device, see if you can connect your carrier's network with it in that location. 4  Contact your carrier to: 5  Verify that your account is active and in good standing. 1 Check for a Carrier Settings Update. 2  Take out the SIM card and then put it back in. 3
http://www.everythingicafe.com/reset-settings-on-iphone-ipad/ https://support.apple.com/en-us/HT201415 https://support.apple.com/en-us/HT201415 http://apple.stackexchange.com/questions/90506/what-precisely-does-reset-network-settings-do-on-an-iphone http://www.iclarified.com/51924/how-to-reset-your-network-settings-on-the-iphone-video http://smallbusiness.chron.com/happens-reset-iphone-48640.html http://www.tomsguide.com/us/iphone-reset-guide,news-21433.html https://discussions.apple.com/thread/3807539?start=0&tstart=0 http://www.ehow.com/how_7842445_reset-network-settings-iphone-4.html https://support.apple.com/en-us/HT201415
what does resetting your network settings on iphone do