Repair parts TCL 40 NxtPaper
Receive it on wednesday 28 de october
In this category, you’ll find the available replacement parts for the TCL 40 NxtPaper: screen assembly, battery, charging port and rear cover. Suitable for both people repairing their own phone and repair shops that need the exact part. It was TCL’s first smartphone with an NXTPAPER screen, a matte, anti-glare LCD designed for hours of reading, and this feature affects your choice of screen. The name is shared by two different phones, one 4G and one 5G, so the first step is to check which one you have.
TCL 40 NxtPaper 4G (T612B) and 5G (T771K): how to identify yours
The 4G variant has model code T612B, found in commercial references such as T612B-2ALCGB12 or T612B-2BLCGB12. The 5G variant uses code T771K (for example, T771K3-2ALCA112). They launched at the same time and share the same name, but they are different phones inside and out.
To check, go to Settings > About phone: the name shown will tell you whether you have the 5G version or not. You can also check the label on the box, which shows the full code. If you no longer have the box and the screen won’t turn on, there is a visual clue: the 5G has a waterdrop notch for the front camera and a black body.
| Feature | TCL 40 NxtPaper (4G) | TCL 40 NxtPaper 5G |
|---|---|---|
| Model code | T612B | T771K |
| Screen | 6,78" FHD+ (1080 x 2460), 90 Hz | 6,6" HD+ (720 x 1612), 90 Hz |
| Battery | 5010 mAh, 33 W charging | 5000 mAh, 15 W charging |
| Processor | MediaTek Helio G88 | MediaTek Dimensity 6020 |
Don’t confuse it with other models in the 40 series, such as the TCL 40 SE or the TCL 40 R 5G, or with the 50 NxtPaper series: these are different devices with their own parts.
Which parts fit each version of the TCL 40 NxtPaper
Two NXTPAPER screen sizes, depending on the version
Both versions have a 90 Hz NXTPAPER screen, but the size and resolution differ, so each one needs its own replacement. If your phone is the T612B, the right part is the compatible screen assembly for TCL 40 NxtPaper 4G, measuring 6,78 inches FHD+. If it’s the T771K, you need the screen assembly for TCL 40 NxtPaper 5G, measuring 6,6 inches HD+. The dimensions are different, so the screens cannot be swapped.
Both are Premium-quality compatible replacements that replace the complete front assembly. The fingerprint reader is not part of the screen: it is in the power button, so replacing the front assembly does not affect fingerprint unlocking. The original panel’s matte, anti-glare finish is a distinguishing feature; with a compatible screen, the surface finish, brightness or colour tone may differ slightly from the factory screen. If you mainly use your phone for reading, bear this in mind when deciding; if you want an affordable alternative to get your phone back in working order, Premium quality is a suitable choice.
4G battery life: TLP049DA reference
The 5010 mAh TLP049DA battery for TCL 40 NxtPaper 4G matches the official capacity of the T612B, which supports 33 W fast charging. The 5G version is rated at 5000 mAh and charges at 15 W, which is why this reference is listed for the 4G variant. Before ordering, check the code printed on your battery: if it says TLP049DA, this is the part you need.
This is a Premium-quality replacement. The battery is built in and is not user-removable, so replacing it requires opening the phone by removing the rear cover. In our research, we found no TCL documentation about pairing the battery with the board on this model, or about non-original part warnings after replacement.
Midnight Blue and Opal colours in original quality
The original rear cover for TCL 40 NxtPaper is available in Midnight Blue and Opal, the two finishes in which TCL sold the 4G version (Midnight Blue and Opalescent in its catalogue). The 5G was sold in black, so if your phone is that colour, it is the T771K and you should bear this in mind before buying.
As this is an Original part, the fit and colour match the factory finish, which matters to repair shops when a customer wants the back of their phone to look the same as before. The cover cannot be opened by hand: the phone has a sealed body and the cover is attached to the frame, so it must be carefully prised off. Check the product photos to see which elements are included, such as the camera lens, in case you need to reuse any parts from your old cover.
What OEM quality means for the charging connector
The OEM USB-C charging port for TCL 40 NxtPaper is the right choice when the connector no longer holds the cable securely or charging is intermittent and you have ruled out the charger. OEM quality follows the specifications of the original component, which is important for a model that charges at 33 W. As the product is listed under the general model name, please contact us before ordering if you have the 5G version, so we can check compatibility.
TCL 40 NxtPaper features that affect repairs
The most important feature is the NXTPAPER panel itself. TCL states in its support information that, because of the special material used for this type of screen, tempered-glass protectors and films are not recommended. If you replace the screen to restore the matte finish, it’s a good idea to let the customer know before fitting a screen protector.
As for biometrics, both the 4G and 5G have a side-mounted fingerprint reader integrated into the power button, as well as camera-based face unlock. Neither has an in-screen fingerprint reader, so fingerprint recognition does not depend on the panel you fit. For repair shops, the practical conclusion is clear: check the model code before ordering any part, as the 4G and 5G do not share a screen and the battery listed is for the 4G.
Frequently asked questions about TCL 40 NxtPaper parts
Is the TCL 40 NxtPaper 5G screen compatible with the 4G?
No. The 4G (T612B) has a 6,78-inch FHD+ screen, while the 5G (T771K) has a 6,6-inch HD+ screen. Their dimensions do not match, so each version needs its own screen assembly.
Will the fingerprint sensor stop working when I replace the screen?
It shouldn’t, as the fingerprint reader is in the side power button, not the screen. Replacing the front assembly does not affect this component.
Can I fit a tempered-glass protector over the new screen?
TCL recommends not applying films or tempered-glass protectors to its NXTPAPER screens because of the surface material. If you want to protect it, a folio case is an option that does not touch the panel.
How can I check whether my battery is a TLP049DA?
When you open the phone, you’ll find the code on the battery label. If your phone is the 4G (T612B) with 5010 mAh, this is the reference it uses.
