How to check the main zin when buying an old iPhone

In addition to checking the external appearance and taking a look at the functions when buying an old iPhone, it is also important that you check if the essentials of the old iPhone are still original. To check if the essential is still original or not, you must open the curtain or you can open all the essentials to see the element.

Apple always reminds, those who know and specialize in iPhone can recognize the face, but not everyone shares it for free for shoppers. In the article below, I will guide users on how to check if the essential iPhone is still zin or not in the most effective way.

Note: The requirement is that the user knows how to disassemble the device, or ask someone to remove it.

Instructions to check if the old essential iPhone is original or not

You use a specialized tool to remove the iPhone screen, then test it as follows:

– After opening the screen, you will immediately see the entire top surface of the essential as well as the battery of the old iPhone. Buyers note the red drilled items in the photo below. That’s where the iPhone’s battery Seal is located.

Because an original Apple iPhone must have this battery Seal. If removed and lost, it is necessary to ask why it was lost. Because only by removing the machine to repair or touch anything, it will be lost.

Old iPhone

-After paying attention to the battery seal, users should note that the second feature is the default stamps that come with Apple when processing and selling the device. Because when removing the machine to repair or do anything to the essential, the mechanic must tear, or rather touch, this stamp. Buyers see the photo of the item circled in red below all stamps are intact and have not been touched or torn.

Old iPhone

– You just imagine that if you want to enter the city, the king’s palace needs to have access cards. That stamp can correspond to a card. The steel cages on the essential iPhone are likened to the door to open for users to enter the forbidden palace. If opened, there will be traces.

The steel cage on the essential zin will always be clean, white and straight, with no warping or warping nor with stains on it.

Old iPhone

-When you put the essential vertically, you will see the soldering pins on the cage with no signs of torch, solder.

Old iPhone

– When repairing an old iPhone, it is difficult for the repairman, no matter how skillful, to keep all the essentials or the flat surfaces on the IC of the device. Old iPhone with Important zin ICs are clean and have no signs of dirt, solder marks.


The above is a way for users to check the essentials of the old iPhone with zin or not. However, when buying an old iPhone, few addresses allow you to remove the device to check. Therefore, you should go with someone who is knowledgeable about iPhone to check the device to avoid buying the wrong product.

To own a genuine old iPhone 6 with clear origin, you can go to mobile phone address is an address with seniority in the distribution of all iPhone, Samsung, and Xiaomi lines that are trusted by many customers. Is a reputable new and old iPhone 6 supplier trusted by many customers.

Old iPhone 6

In particular, the old iPhone 6 phones at are highly tested by customers for quality and price, becoming a prestigious address for customers to recommend to relatives and friends.

Normally, the old iPhone 6 is always cheaper than the new 100% from 1 million VND or more and depends on how new and old the product is. The old iPhone 6 at 24hStore is completely original and 100% quality, with a clear origin, stamps listed according to Apple standards, you can be completely assured of the quality of the device.

The old iPhone 6 at is a new 98-99% Fullbox international version activated. When you buy an old iPhone 6 at you will get:

> 1 for 1 in the first 7 days.

> 50% off waterproof nano coating to protect health.

> 15% off when buying more leather cases, cases.

> Lifetime free software support.

Especially when buying an old iPhone 6 with the 24hVip Warranty Package, you will receive the following exclusive incentives:

– Warranty up to 12 months


– VIP warranty only applies to beautiful Zin machines.

– Support to create Apple ID, install application software, Video games, Video, Music… for free.

If you find an old iPhone 6 at 24hStore with any signs of counterfeit, poor quality imitation, floating goods of unknown origin, please report it and you will be compensated 10 times the product value and receive a refund. Free 1 iPhone 7 Plus! Not only that, 24hStore is also the place to sell iPhone, the cheapest in the market. If you find another place that sells it cheaper, you will be refunded the difference. – The first place in Vietnam to sell iPhone Likenew Fullbox EXCLUSIVE 12 month warranty 1 to 1 exchange

? Address: 418 Nguyen Trai, Ward 8, District 5, City. HCM.

? Address : 652 3/2 Street, Ward 14, District 10, City. Ho Chi Minh City

? Address: 249 Tran Quang, Que Khai, Tan Dinh Ward, District 1, Ho Chi Minh City.

? Address (authorized service center): 1112 – 1114 Ba Thang Hai, Ward 12, District 11, HCMC.

☎ Scientific equipment retail switchboard: 1900.0351

☎ Repair Switchboard: 1900.5555.34.

? Hotline for urgent support: 0967849934

Web site:

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By Nguyen Manh Cuong

Nguyen Manh Cuong is the author and founder of the nguyendiep blog. With over 14 years of experience in Online Marketing, he now runs a number of successful websites, and occasionally shares his experience & knowledge on this blog.