Note necessary when buying old iPhone

With only VND 3 million, users can now buy an iPhone 3G or even a used iPhone 3GS. However, to ensure that it is a good iPhone, you need to keep in mind the following.

Network lock version or unlock?

Previously, most iPhone 3G / 3GS or iPhone 4 models sold in Vietnam were network lock versions, requiring users to jailbreak to unlock before using. Fortunately, at the present time, most of the iPhone network versions of AT&T (USA) have had a solution to completely open the network (becoming an international version) with prices ranging from 150,000 VND-250,000. This means that when you buy the iPhone has been locked to the network, you should choose to buy the iPhone originating from AT&T network (USA) to facilitate the opening of the network later. How to check is quite simple, you just need to access the Settings icon > General settings> About> Model . Typically, iPhones originating from the US market usually have a sequence of characters.

In the case of buying a device at a store, you should ask the seller to always open the network using this method to turn the phone into an international version. The price of this method of opening the network is higher than the way to open the network with software, but its advantage is that users can upgrade the firmware later without paying a fee. Moreover, this can also minimize the common errors on jailbroken iPhones.

Touch screen

The touch screen is one of the most important things you need to check before buying any new or old iPhone. With the naked eye, it is difficult to find the difference between an iPhone that has never been repaired, and one that has been replaced with a 'lot' screen. Even so, you need to accept this fact that many of the old iPhones sold in Vietnam have been replaced by the 'lot' screen before selling out. Therefore, if you have the psychology to accept 'living with the flood' , you should know how to check whether the screen is really good.

There are two commonly used steps to check the iPhone screen. First, press and press a program icon on your iPhone to switch to the icon arrangement mode (now the icons on the phone will vibrate slightly). After giving the phone to this mode, hold your hand and drag an icon on the screen horizontally, vertically, and diagonally to make sure that the screen has no areas that are paralyzed. If so, you will not be able to drag this icon across the screen locations.

Next, open a white background default program like Safari or Music to check the smoothness of the screen background. Then continue to switch to black background to make sure that the screen does not appear dead spots (very small spots that are white, blue, red .). Although these dead spots may not affect the usage at all, it also tells you a lot about the 'health' status of the monitor. For example, white light spots that appear when viewed on a white screen are often caused by the phone being waterless before, or because the device was accidentally plagued by sharp objects.

Guarantee

For Apple products, you should note that the warranty information of the device will reveal to you a lot of information about the status and origin of the device. Therefore, never forget to check this step before deciding to buy an iPhone, new or old. Unlike other manufacturers, Apple usually does not manage its device via the IMEI number, but manages through its Product Serial number ( Access Settings> General settings> About> Serial Number) ri ). After having the serial number of your device, you access the address, then enter the device Serial number into the input form to check. For machines with warranty, you can take the warranty period minus 1 year to know the initial activation time of the machine (2 years for a machine with an AppleCare + warranty extension package). It should be noted that this warranty period is Apple's global warranty period, not the warranty period agreed upon by the stores.

In parallel with the warranty check, you can also check whether it is a reasonable iPhone for a price. Reasonably here, your iPhone does not come from stolen goods, warranty returns, or errors in production that are out of the market. If your iPhone is in this category, the result will be a line of information with the content: 'We're sorry, but this is a serial number for a product that has been replaced. Please check your information and re-enter your serial number ' . It is possible that this iPhone Serial number has been replaced or canceled for some reason.

Accessories

When buying old iPhones in stores, usually you only get chargers, headsets, 'lots' connection cables that are rarely included with genuine goods. These types of accessories can cause a lot of trouble for you later if they are of poor quality. Common errors can be found such as the fact that the battery is not fully charged, the device is hot, or even an explosion during charging . Therefore, you should ask for genuine accessories, though possible. it will cause the price of the 'team' to rise slightly. Within the limits of the article and the variety of genuine accessories, e-CHP cannot provide details on how to distinguish between genuine accessories and 'batch' accessories, but you still basically It can be easily recognized by the naked eye if it is a poor quality component.

Of course, the above notes are just the most basic notes so you can choose for yourself an iPhone. In fact, you need to combine with other basic old phone test methods such as voice quality check, Wi-Fi, speakerphone . to make sure it's an affordable iPhone. . Don't be too sophisticated in terms of formality, because most iPhones with beautiful conditions like new ones are usually newly refurbished or replaced.