Maybe you received an iPhone as a gift or are in the market for a used one.There are some physical differences between the two, but they are almost the same.If it's an Apple product, you should make sure you buy it.You can use software to figure out the model of the device, or you can differentiate between physical differences.
Step 1: The front and back of the house should be looked at.
The front and back of the iPhone 4 and 4s are made of glass, with a band around the edges.
Step 2: There are Volume buttons.
Volume buttons are marked with a plus and minus sign.
Step 3: Take a look at the tray.
There are two models of the phone.CDMA does not have a tray for a micro-SIM card.There are three different models of the iPhone 4s.Micro-SIM cards are included in all models.
Step 4: You should know the model number.
There are two model numbers for the iPhone 4: A1349 for CDMA and A1332 for GSM.There are two model numbers for the iPhone 4s: A1431 for China and A 1387 for CDMA models.There are model numbers at the back of the phone.
Step 5: You can identify the differences in antenna breaks.
Depending on the model, your iPhone will have a slightly different pattern of antenna breaks or small notch in the silver side band.There are three antenna "breaks" in the metal band, one on the top and two on each side.There are four on both sides of the iPhone 4 and 4S.
Step 6: Go to your computer and connect your phone.
To use software to identify your phone, you need to connect it to your computer.Use the cable that was included at the time of purchase to make sure your phone is connected.
Step 7: Everyi.com's Ultimate Lookup feature or the EveryMac app can be downloaded and installed.
These softwares can identify the models by their serial numbers.If the phone turns on properly, you can easily identify the model you have.
Step 8: You need to find the "Model" number to use the app.
To use the model finding apps, you need to find this specific number and input it.The order number is referred to as "Model" by Apple.The "Model" can be found by selecting the "Settings" app and scrolling until the field is visible.Use the model number in the app to find your phone's model.