Samsung Galaxy A40 Troubleshooting

What issues are you experiencing?


  • Not charging out of the box, charging slowly
  • Device not turning on
  • Battery draining quickly
  • Phone keeps rebooting randomly

Internet & Network


  • How to take a screenshot
  • Unfortunately, Camera has stopped
  • Warning: Camera failed
  • Camera is out of focus

Operating System

  • Stuck on Black Screen of Death
  • Different ways to reset Galaxy A40
  • Keeps freezing and lagging
  • Running so slow, poor performance

Calls & Texts

  • Text messages not sent or received
  • Unfortunately, Messages has stopped
  • Phones calls keep dropping
  • Callers can't hear users


  • No sound and other audio issues
  • Loudspeaker doesn't have any sound
  • Bluetooth headset has no sound
  • Notifications don't play


  • Facebook keeps crashing, not working
  • Twitter closes by itself, not updating
  • Nova Launcher crashes, causes phone to lag
  • Messenger crashes, closes on its own


  • Screen keeps on flickering
  • Screen is black but phone is powered on
  • How to repair broken screen
  • Display shows some dead pixels


  • Unable to read mounted SD card
  • Some apps in SD card not working
  • How to free up some storage space
  • Server storage full, unable to write on SD card



  • 64 GB ROM
  • 4 GB RAM
  • with microSD card slot, supports up to 1 TB (dedicated slot)


  • Android 9.0 (Pie)
  • Exynos 7885 (14 nm)
  • Octa-core (2x1.77 GHz Cortex-A73 & 6x1.59 GHz Cortex-A53)
  • Mali-G71 MP2


  • Comes with stereo speakers
  • 3.5mm jack
  • Active noise cancellation with dedicated mic

Battery Life

  • Non-removable Li-Po 3100 mAh battery
  • Fast battery charging 15W


  • Super AMOLED capacitive touchscreen, 16M colors
  • 5.9 inches, 85.5 cm2 (~85.5% screen-to-body ratio)
  • 1080 x 2340 pixels, 19.5:9 ratio (~437 ppi density)


  • Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot
  • Bluetooth 5.0, A2DP, LE
  • NFC
  • FM radio
  • USB 3.1, Type-C 1.0 reversible connector


Main Camera

  • 16 MP, f/1.7, 26mm (wide), PDAF
  • 5 MP, f/2.2, 13mm (ultrawide)
  • LED flash, panorama, HDR
  • [email protected]

Selfie Camera


  • Dimensions: 144.4 x 69.2 x 7.9 mm (5.69 x 2.72 x 0.31 in)
  • Weight: 140 g (4.94 oz)
  • Build: Front glass, plastic body
  • SIM: Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)

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