WhatsApp has been blocked from millions of smartphones as of Monday with users being warned to update their software. 

The messaging platform will no longer be available on more than 50 types of phones.

From November 1 WhatsApp will no longer be supported on 53 models of phones.

It will not work on Android phones running OS 4.0.4 and older, and for iPhones it requires iOS 10 or newer.

Users of Android and Apple devices have been warned to upgrade their devices or update their software.

If upgrading to a new device existing accounts will be re-enabled when entering the same phone number associated with it.

People can find out what operating system their phone uses by checking it in the settings function.

WhatsApp, which is owned by Facebook regularly updates which systems it supports on its help centre. 

The platform will no longer work on these phones after November 1:

iPhone

  • iPhone 6
  • iPhone 6S plus
  • iPhone SE

Samsung

  • Galaxy Trend Lite
  • Galaxy Trend II
  • Galaxy SII
  • Galaxy S3 mini
  • Galaxy Xcover 2
  • Galaxy Core
  • Galaxy Ace 2

LG

  • Lucid 2
  • Optimus F7
  • Optimus F5
  • Optimus L3 II Dual
  • Optimus F5
  • Optimus L5
  • Best L5 II
  • Optimus L5 Dual
  • Best L3 II
  • Optimus L7
  • Optimus L7 II Dual
  • Best L7 II
  • Optimus F6, Enact
  • Optimus L4 II Dual
  • Optimus F3
  • Best L4 II
  • Best L2 II
  • Optimus Nitro HD
  • Optimus 4X HD
  • Optimus F3Q

ZTE

  • ZTE V956
  • Grand X Quad V987
  • Grand Memo

Sony

  • Xperia Miro
  • Xperia Neo L
  • Xperia Arc S

Huawei

  • Ascend G740
  • Ascend Mate
  • Ascend D Quad XL
  • Ascend D1 Quad XL
  • Ascend P1 S
  • Ascend D2

Other smartphones

  • Alcatel
  • Archos 53 Platinum
  • HTC Desire 500
  • Caterpillar Cat B15
  • Wiko Cink Five
  • Wiko Darknight
  • Lenovo A820
  • UMi X2
  • Run F1
  • THL W8