Quick answer: To check a Sunlong panel, buy from an authorized source first, then verify the model match, brightness, colour evenness, touch response, connector and packaging before installing. Sunlong’s Pakistan site names an official authorized distributor. Junaid Telecom, Madrasa Banat Road, Dhol Sikandar, Chiniot, holds the official Sunlong dealer letter.
Why is spotting copy screens hard?
A replacement panel looks like a black rectangle until it is powered on. Most differences only appear once it is installed: dim brightness, tinted whites, uneven edges, touch dead spots. By then the back cover is on and the customer is waiting. That is why technicians prefer to check at the counter and buy from sources they can return to.
Important note: we are not going to claim a secret mark that identifies every Sunlong panel. Packaging and markings vary by model and batch, so use the tests below and rely on the supplier’s authorisation.
The six-step panel check
1. Confirm the model
Match the panel’s model against your phone’s exact model number. Panels that look the same at a glance may have different connectors or sizes.
2. Inspect before powering on
- Look at the edges for glue marks or uneven finish.
- Check for scratches on the glass.
- Check the flex cable for bends or damage.
3. Check brightness and colour
If possible, power the panel up on a test fixture or the phone. Compare brightness against a known good screen. Sunlong promotes high brightness and vibrant colours, so a dull panel is worth questioning.
4. Test colour evenness
Display a plain white, then black, then a colour test image. Look for tinting, patches, lines or bright spots.
5. Test touch
Drag your finger across the whole surface, including corners. Look for dead spots or ghost touches.
6. Check the connector and fit
The flex connector should fit the phone’s board properly. A panel that needs forcing is the wrong model or a poor copy.
What does “120Hz” mean for identification?
Sunlong promotes 120Hz panels. A 120Hz panel only makes sense on a phone whose original display supports it. If you are replacing a 60Hz phone’s screen, a 120Hz claim is not a reason to buy; the correct model match is. Ask the dealer to confirm what refresh rate the panel for your model is meant to have, and test smoothness after installation using a scrolling page.
Quick table: good panel vs panel to question
| Check | Good sign | Question it |
|---|---|---|
| Brightness | Even and strong | Dim or flickering |
| Colour | Even whites, rich colours | Tinted whites, patches |
| Touch | Smooth across the screen | Dead zones, ghost touches |
| Connector | Seats cleanly | Needs force or does not align |
| Seller | Authorized, explains warranty | Vague answers, no dealer proof |
What about warranty?
Because Junaid Telecom is an authorized dealer, the official brand warranty applies as per Sunlong’s policy. We do not state any duration here, because that is the brand’s decision. Ask the counter for the terms, and keep your invoice. Remember that warranty usually covers manufacturing faults, not damage from rough handling or incorrect installation, so check the policy for the details.
Tips to reduce returns
- Test the panel before final assembly if you can.
- Protect the flex cable during installation.
- Clean the area carefully and use fresh adhesive.
- Do not press hard on the display while fitting.
- Keep the panel’s packaging until the customer is satisfied.
Related guides
Visit Junaid Telecom
Junaid Telecom, Madrasa Banat Road, Mohalla Garah, Dhol Sikandar, Chiniot. Open daily 8:00 AM – 9:00 PM. WhatsApp: owner 0345 7701965, staff 0348 8651965, Repairing 0345 7599995. Rates change daily; ask for today’s wholesale rate.