iphone uses cellular mobile network for slow resolution
Step 1, when using 2G or 3G network, if the current network signal is not good, will certainly affect the speed of the Internet. Check the upper left corner of the iphone display for strong or weak signals. If the signal is poor, try changing the position.
Step 2, carefully observe the mobile phone screen in the upper left corner of the network icon display, you will find the following several different signs:
3g: Is the cellular mobile communication technology that supports high speed data transmission, which is the fastest.
EDGE: Enhanced data-rate GSM evolution technology. If there is no 3G or no 3G signal, "E" is usually displayed in the upper-left corner of the phone screen.
GPRS: If the display is a small circle, the current use of the GPRS network, which is the slowest of the three kinds of mobile networks.