Battery repair is a common repair case every day. Today we're going to share with you the steps and details we need to pay attention to when replacing the battery cell.

Firstly, we use a clamp fixture to separate the phone

Remove the battery

Then we need to solder the BMS board of the original battery to the new battery

Remove the protective tape on the BMS board

Disconnect the cathode and anode of the battery with a pair of scissors

Please do not break the flex cable

Remove the original battery BMS board

Pry apart the anode tab and cathode tab

Place them on the welding clamp fixture

Put the battery cell with nickel-plated tabs onto the welding clamp fixture\

The cathode tab and anode tab are settled under the BMS board

Please align the anode and cathode respectively

Solder with the Spot Welder

Note that one end of the spot welding pen is placed on the conductor material (copper)

The other end is placed at the point to be soldered

Folder well the tabs after soldering

Apply the protection tape

Put on the protection bracket

Wrap another layer of protection tape on the outside

Connect the programmer to the laptop

Open the software

Click reading the battery data

Select the data that needs to be rewritten

Recalibrate the cycle times and battery efficiency

Click writing, and then the recovery

Disconnect the cable

Connect the power cable to turn on the phone

“Important battery message” is displayed

Turn off the phone and take out the battery

We install the new battery

It will be verified automatically by the system

There is no “Important battery message” now

A bitmap is the primary repair software in the motherboard repairing area, which can help us search out the issue point. As you all know, REFOX Bitmap was publicly released in 2019, it covers 236 countries and areas, and more than 110,000 users have joined us. The new subscribed version has been updated with more functions and rich content compared to the old version. Now let's explore it.

Firstly, we can download the app on REFOX's official website: https://www.refoxteam.com/download-bitmap

After registration, we need to sign up, and if you are an old user, you can use the original account to log in. There are three different packages we can choose from REFOX Bitmap. You will receive an activated number after the payment.

REFOX Bitmap Subscribed Version supports more than 2000 models, including MacBook, iPhone, and Android. This software has abundant diagram types covering bitmap, schematic, components distribution, and circuit block diagram.

Let's move on to the interface of the software. Its interface is straightforward with full features. REFOX Bitmap is updated monthly, and we can check out the update log below.

Split View&Multi View

Here's the double view function. It's able to check the bitmap and schematic at the same time while repairing, which is convenient and efficient for your work. What if you work for various motherboard types, and you hope to check them out one by one? No worries, REFOX Bitmap offers you multi-page at a time. It can switch to different pages in the same interface, making it easier to check out your project.

Save to Your Favourites

You can save the bitmap you use very often or the necessary ones into the favorites, making it easy to find it next time. The favorite folder is on the left side of the interface.

Quick Search

If you want to locate a bitmap, input the motherboard name or number to find the bitmap you wish. This function can help us easily locate the bitmap quickly.

Color Template Setting

Based on maintenance needs and usage habits, you can set the color template to a particular mode. It's easy to get started.

Case Sharing and Feedback

If you have any problems when using the software, you can upload your feedback at any time. And it's encouraged that subscribers could share their repair case with REFOX Bitmap Team. In this way, more and more users will benefit from your sharing and good advice for REFOX Team to make it better.

Lastly, it's time to update your REFOX bitmap version for the old users. And it's a good chance for the maintenance to try this advanced software, which will be your best assistant for your repair career.

Some people may come across such problems when using the iPhone with Face ID - iPhone continues to prompt "Move a Little Lower/Higher". But no matter how you move, you can’t reset the Face ID. You can try the following methods to solve the problem:

1. Restart your device

iPhone X and later model restart method: please press the side button and any volume button until the slider is displayed, then slide the slider to shut down; then press the side button until the Apple logo appears.

If it is a problem with software or temporary system failure, it is generally resolved after reboot.

2. Take off the film or check if there is dirt

Please check if there is a stain or occlusion near the front camera, and clean it with a lift.

3. Check if the device is water damaged

If the device has touched or fallen into the water before the problem occurs, it may cause the Face ID not working. Please bring your device to Apple after-sales.

Understand if the iPhone is water damaged by the indicator:

Most iPhones are equipped with an LCI that can be seen from the outside. The LCI can tell if the device is not exposed to a liquid or aqueous liquid. Normally, the indicator should be white or silver. But after contacting the water or aqueous liquid, it will become red.

To determine if the LCI of your device touches the liquid, you can refer to the following picture to help you see the LCI. Please use the lamp magnifying glass, adjust the angle of the light or device until you can see LCI.

4. Update the system

If the device is not accidentally water damaged, you can try to update the system to the latest version. If the problem is still unable to resolve, you should send your device for repair in no time.

If you don't want the content recorded in the iPhone's memo to be easily viewed by others, you can set a password for the memo or unlock the memo through face ID.

Notes before use:

1. It is recommended to create a password that is easy to remember and set a password prompt for yourself. Make sure you can remember the password, otherwise you may not be able to view the locked memo.

2. If you access your iCloud memo on multiple Apple devices, you will use the same memo password to lock and unlock all memos.

3.Enabling Face ID or Touch ID as a memo password will add the encryption key used to the encryption memo to your key chain, which can be accessed through your device password. This means that anyone who has your device lock screen password can access your lock memo. To maximize security, you can choose not to enable Face ID or Touch ID as a memo password.

Set the memo password and set the Face ID unlock:

1. Open the memo to be locked, tap "Operation" button or "..." button in the upper right corner, then tap "Lock Memo".

2. Enter your password and be sure to set your password prompt for yourself. At this point, you can choose to access the locked memo through the Face ID and tap "Finish" to save.

If you have already set a password, you need to change your password or set it. You can go to the iPhone "Settings" - "Memo" to make changes.

After locking the memo, it will automatically be protected by the password on all your devices. If you use a Face ID or Touch ID on other devices to unlock a memo, you must enter a password. Then enable the Face ID or Touch ID on the device used.

Recently we got many messages about Face ID not available after screen replacement from our clients, which surprised our technicians greatly. Since the screen replacing would not affect face ID function at all according to our practical verification. However, REWA has done some further researches and will share you the detailed analysis and solution for iPhone X face ID failure caused by damage of flex cable after repair here.

How does face ID work?

First, let’s understand how face ID works. The whole functional area is dubbed the “TrueDepth camera system”, which is made up of flood illuminator, infrared camera, front camera, dot projector, proximity sensor, ambient light sensor, speaker and microphone. Speaking of which, have you read iPhone 8/X Ambient Light Sensor Issues ? Every time you glance at your iPhone X, the flood illuminator detects your face with infrared light and forms an image. Then the dot projector will project out over 30,000 invisible infrared dots over your face to create a 3D map. Last, the infrared camera reads this map and sends the data to neural networks to create a mathematical model of your face. Your iPhone X will check that mathematical model against the one that you've set up and stored on your device to see if it's a match, and if it is, it will unlock your phone.

How do we repair?

According to the description, this iPhone X was dropped once. However, the face ID is in normal status. It fails to work until a replacement of screen assembly. With all the knowledge, we begin our repair.

Power on the phone and it shows “unable to activate Face ID on this iPhone” . So we resort to resetting face ID. Go to Settings > Face ID & Passcode > Reset Face ID. We get the message “Face ID is Not Available, try setting up Face ID later” . Our initial judgment is that the unavailable Face ID might be caused by misoperation in the screen replacing process. Therefore, next thing we do is to check flex cables that are related to Face ID.

Disassemble the phone. And check the Infrared camera and dot projector module under Microscope first. Nothing goes wrong. Then move to the Flood illuminator module on the earpiece speaker assembly. Check the connector and flex cables carefully. Still, nothing goes wrong.

Then remove screws. And detach the earpiece speaker and front sensor assembly from the phone. Be careful not to damage flex cables in the process since the Flood illuminator module is bonded to glass lens with double-sided tape. We can see clearly that the flex cable where locates the Flood illuminator module is fractured at the edge.

Since the Flood illuminator module is an essential part for Face ID circuit, damage of the flex cable can result in not working of it, which can absolutely affect normal working of Face ID. Also, as flex cable repair is difficult, we can solder the Flood illuminator module to a new flex cable. To replace with a new flex cable, we need to separate the earpiece speaker and the ambient light sensor module from the earpiece speaker and front sensor assembly first. Heating with Soldering Iron, the ear speaker was separated successfully. Then, secure the flex cable in the place with High-Temperature Protective Tape for further separating the ambient light sensor module flex cable. Soldering Iron and Hot Air Gun are required to remove this flex cable. Once done, remove excess tins on the flex cable with Soldering Iron and clean with PCB Cleaner.

Now the fractured flex cable is separated completely. Next thing we do is to replace with a new flex cable. Remove the Flood illuminator module on the flex cable first. Prepare a new flex cable. Apply some Paste Flux to the bonding pad. Align the Flood illuminator module in place with the new flex cable. Be careful with the direction. Then solder with Hot Air Gun. Remove residual glue on the module afterward.

The repair part is almost over right the moment. Next thing we need to do is to re-solder the ambient light sensor module and earpiece speaker. However, the soldering of the ambient light sensor is the most difficult part of this repair. Whatever, let’s do it. Apply some Paste Flux to the bonding pad of ambient light sensor module. Then apply tins to the bonding pad with Soldering Iron . Clean with PCB Cleaner. Apply some Paste Flux to the bonding pad again. Get the detached ambient light sensor module flex cable in position. Secure the flex cable with one specific position soldered by Soldering Iron with curved nozzle first. Then use Soldering Iron with cutter nozzle to complete the remaining soldering process. Clean with PCB Cleaner afterwards. Now we need to solder the earpiece speaker back to flex cable.

It’s time to get the earpiece speaker and front sensor assembly assembled to the display assembly. Re-assemble the phone and test. Press power button to power on. Go to Settings > Face ID & Passcode > Set up Face ID . Face ID can be set up successfully. Press the power button to lock the screen. Press the power button again. The screen lights up. Glance at the iPhone X. The screen can be unlocked automatically. Fault cleared.

questions about iPhone X Face ID Not Working After Repairing Tutorial, welcome to comment below or ask a question on ASK Forums .

Click below if you are interested in the Tools & Spare Parts used in the video. For more details and latest price please feel free to contact sales@rewatechnology.com

* Integrated Mobile Phone Repair Platform

* Tri-wing Screwdriver - Type 2

* Straight Tweezer - Type 3

* 4x Optical Microscope - KS7045

* PCB Cleaner - 250ml

* BGA Strip Flux Soldering Paste

* Anti-static Plastic Pry Bar

* Heat-resisting Adhesive Tape - 5.0mm

* 100g Solder Wire - Type 1

* iPhone X Replacement Parts

Visit REWA  online shop  for more parts and tools.

I wanna learn basic knowledge about iPhone motherboard, master iPhone micro-soldering techniques, understand the work-flow of different iPhone circuits, master troubleshooting processes of different iPhone issues, and learn detailed screen/back glass refurbishing steps——You can visit REWA Academy.