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LG Optimus L90 Dual Teardown

Written By: mineisstupid (and one other contributor)
Published: August 6, 2025
  • Comments: 0
  • Favorites: 0
  • Views: 243

LG Optimus L90 Dual Teardown

Written By: mineisstupid (and one other contributor)
Published: August 6, 2025
  • Comments: 0
  • Favorites: 0
  • Views: 243

Teardown

Introduction

To be honest, modern smartphones seem boring to me. Most of them are nearly the same, having the same anti-repair tactics, same specs, etc. But how did things go eleven years ago? Let's take a look, with our specimen, which is going to be a LG Optimus L90 Dual (model D410).

What you need

This teardown is not a repair guide. To repair your LG optimus L90, use our service manual.

  1. LG Optimus L90 Dual Teardown, LG Optimus L90 Dual Teardown: step 1, image 1 of 2 LG Optimus L90 Dual Teardown, LG Optimus L90 Dual Teardown: step 1, image 2 of 2

    • Alrighty, what specs did LG provide for a budget phone like this in 2014?

    • 4.7" 960x540 display at 234ppi

    • Quad-core, 1.2 GHz Snapdragon 400 processor and 450 MHz Adreno 305 GPU

    • 1 GB RAM

    • 8 MP/1080p rear camera with autofocus, and 0.3 MP front-facing camera

    • 3G wireless support, 802.11 b/g/n (2.4GHz) Wi-Fi 4, and Bluetooth 4.0

    • 8 GB built-in memory

    • Android 4.4.2 KitKat, up to Android 5.0.2 Lollipop

    Edit

  2. LG Optimus L90 Dual Teardown: step 2, image 1 of 3 LG Optimus L90 Dual Teardown: step 2, image 2 of 3 LG Optimus L90 Dual Teardown: step 2, image 3 of 3

    • Those specs were quite fine for that time. This phone even had enough storage to download basic apps, unlike its smaller brother, LG Optimus L70. I mean, come on, it had only 1.5 GB available out of given 4 GB for apps, and two thirds of that space were already taken by preloaded apps! That is quite harsh.

    • Anyways. The plastic back cover is held by plastic clips and is easy to remove. Underneath it lies a LG's 3.8V 2540mAh BL-54SH battery.

    • And it still has a warning icon, indicating that it's unsafe to let pets smaller than this battery anywhere near it. Just like its bigger and beefier brother.

    Edit

  3. LG Optimus L90 Dual Teardown: step 3, image 1 of 2 LG Optimus L90 Dual Teardown: step 3, image 2 of 2

    • Time to pull out the PH00 screwdriver! The midframe is held by eleven 4mm screws. For some reason, my unit lacks one screw. Did somebody steal it while I was sleeping?

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  4. LG Optimus L90 Dual Teardown: step 4, image 1 of 3 LG Optimus L90 Dual Teardown: step 4, image 2 of 3 LG Optimus L90 Dual Teardown: step 4, image 3 of 3

    • But we're not done here yet, as the midframe is also held by plastic clips. Time to break it off with a spudger!

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  6. LG Optimus L90 Dual Teardown: step 5, image 1 of 1

    • As I'm flipping the midframe, we can see some antennas, a vibration motor and a speaker. Nothing interesting here, sadly.

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  7. LG Optimus L90 Dual Teardown: step 6, image 1 of 3 LG Optimus L90 Dual Teardown: step 6, image 2 of 3 LG Optimus L90 Dual Teardown: step 6, image 3 of 3

    • We're getting closer to that yummy teal bowl that's full of chips now! Time to unplug the flex cables.

    Edit

  8. LG Optimus L90 Dual Teardown: step 7, image 1 of 2 LG Optimus L90 Dual Teardown: step 7, image 2 of 2

    • Time to take a small look at the cameras. Look how tiny the 0.3 MP front camera looks compared to the 8 MP rear camera!

    • And don't forget about the headphone jack and the earpiece speaker! Just like the camera modules, they're modular and easy to pop off.

    Edit

  9. LG Optimus L90 Dual Teardown: step 8, image 1 of 3 LG Optimus L90 Dual Teardown: step 8, image 2 of 3 LG Optimus L90 Dual Teardown: step 8, image 3 of 3

    • Time for the grand reveal! The front side doesn't have any interesting chips.

    Edit

  10. LG Optimus L90 Dual Teardown: step 9, image 1 of 2 LG Optimus L90 Dual Teardown: step 9, image 2 of 2

    • However, if we flip the motherboard and take the EMI shield off, we can finally take a look at these beautiful silicon chips!

    • SK Hynix H9TKNNN8JDAPLR-NGH 1GB LPDDR2-1066 RAM

    • The Quad-core, 1.2 GHz Snapdragon 400 SoC is layered beneath the RAM

    • Samsung KLM8G1WEMB-8031 8 GB eMMC 5.0 NAND flash

    • Skyworks SKY77573-31 Tx-Rx Front-end Module for GSM/GPRS/EDGE

    • Atmel mXT336S-AT

    • Qualcomm PM8226 power management IC

    • Because of that obnoxious camera zoom, I wasn't able to identify other chips. Maybe I should buy a proper camera instead of shooting everything on my Pixel...

    Edit

  11. LG Optimus L90 Dual Teardown: step 10, image 1 of 3 LG Optimus L90 Dual Teardown: step 10, image 2 of 3 LG Optimus L90 Dual Teardown: step 10, image 3 of 3

    • The daughterboard, on the other hand, doesn't have anything interesting on it. Just some regular stuff that you'll see on other daughterboards.

    • Micro-USB 2.0 port

    • Vibration motor spring contacts

    • Speaker spring contacts

    • Coax connector

    • Microphone

    Edit

  12. LG Optimus L90 Dual Teardown: step 11, image 1 of 1

    • I decided not to take this phone down even further. But believe me, if you'll look for screen replacement guides, you'll find out that the IPS panel and the touchscreen aren't fused!

    • I'm pretty sure that if iFixit team decided to tear this phone down back then, it'd definitely score 10 out of 10. This phone is as modular as the latest Fairphone 6!

    Edit

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mineisstupid

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