[attachmentid=5092742]
[attachmentid=5092735]
[attachmentid=5092736][attachmentid=5092738][attachmentid=5092739]

time to visit service center.
it is sub key problem. The sub key should be sensitive like screen.
my unit also have this problem, first is multitasking key not sensitive (need to press instead of touch), after repair, both key not sensitive (need to press), but they refuse to repair again, and insist that is not an issue.
After argue with them hardly, they finally agree to run a test, and told me this is an xxx issue next day.

This problem start right after they replace new motherboard for me (first warranty visit, camera issue). btw, Samsung service center, E-Gate, Penang.
Whole process takes 1 month+, visit center more than 10 times, repair at least 6 times.

Just give some advice for Penang forumer.
I have very bad experience on Samsung Service Center, E-Gate, Penang.
Very bad workmanship, unprofessional.
1. First I send warranty because of camera issue, they leave a big dust inside the lens.
2. Call me to collect the phone on the next day, and said that the dust inside the lens is not an issue! (They leave a big dust inside the lens and said this is not an issue!)
3. Then sub key issue (because they didn't fully test the phone after replace the motherboard, they only test camera)
4. Went center over and over again for camera dust and sub key issue.
5. refuse to repair although that obviously a problem exist.
6. New scratches&dent on phone, and screen adhesive.
7. hand over the phone to me without a single screw (missing screw).
8. They exchange my battery with other people battery!
9. Without a single apologize for all this mess.

- Please fully test your phone after they repair your phone before you leave the counter, because they are not fully test your phone after repair.
- Check the screw. (Yes, they hand over the phone to me with missing screw! and told me it has finish repaired)
- Please check the outlook of your phone.
- Check the battery, they mess up my battery with other people's battery.

Look at their workmanship:
Screen adhesive:


scratches(IR) and dent (Top bazel):


Phone without a single screw, and they told me the phone has finish repaired!