- IPhones are able to access either 3G or 4G networks. These allow you to connect to the Internet or to use apps that require Internet access even if your phone is not receiving a Wi-Fi signal. Wi-Fi signal requires that you're within range of a wireless router. While these are widely used in homes, offices, and businesses, their range is generally confined to the immediate surroundings of the given establishment. In contrast iPhones generally have 3G or 4G access anywhere they have cell phone signal.
- Many iPhone functions work without Internet access. These include the phone itself, the iPod, text messaging, the camera, the address book, and utility apps such as the clock, calculator, and voice memo recording. Common apps that require Internet, whether it comes from Wi-Fi or 3G/4G network, include Maps, YouTube, Safari, Mail, iTunes and App Store.
- The Wi-Fi indicator is located on the information bar on the top of the iPhone to the right of the clock. It consists of three curved lines with smallest on the bottom and the largest on the top. The more of these lines are highlighted, the stronger the Wi-Fi signal. It may be possible to get Wi-Fi even if all of these bars are empty. To do so, go to Settings and choose Wi-Fi. Make sure the Wi-Fi switch at the top of the menu is turned on. Below this switch is a list of available Wi-Fi networks. Look for a network that does not have a padlock icon, as these require passwords. Touch that network to connect to it.
- 3G and 4G connections resemble normal cell phone reception in that they may be unavailable in one spot, yet available in a spot a few steps away. If Wi-Fi is unavailable, you can walk or drive around your immediate vicinity. If your cell reception gets stronger, as indicated by the bars on the top of the screen, chances are your 3G or 4G networks access will improve as well.
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