H21. Mini4 Narrow Frame Disassembly Core Tips
- Set heating temperature at 85℃ constant for frame glue softening, 120-second cyclic heating to avoid local overheat;
- Insert thin steel shim only 1mm deep along frame gap, stop prying near bottom flex concentration area;
- Prioritize flex detachment before full glass separatio
H22. Top5 Post-repair Common Fault & Prevention
- Edge touch dead zone → uneven adhesive overflow blocks sensor opening; control glue range during fitting;
- Early screen warping → residual old glue not fully cleared before new adhesive application;
- Intermittent touch → flex over-bending during installation; reserve reasonable cable bending space;
- Random ghost touch → low-quality non-OEM digitizer; verify original-level touch panel before mounting;
- Camera black screen → front lens dislocation during screen pressing, realign lens position before full compression.
H23. A1538/A1550 Minimal Hardware Difference
Cellular A1550 adds antenna near right frame, avoid antenna damage when separating right-side screen glass.