The official WhatsApp help center says the app now requires iOS 10 or newer for iPhone users, OS 4.1 or newer for Android phone users, as well as KaiOS 2.5.0 or newer, including JioPhone and JioPhone 2. It can only run on devices that can receive an SMS or phone calls during the verification process. However, it still offers limited support for Android tablets with an active SIM card. Older phone users are advised to switch to a supported device before then.

Many times people are reluctant to switch to new devices because it will delete their WhatsApp chat history. Although it is not yet possible to transfer chat histories between platforms, for example from Android to iOs, it is possible to save your chat history and export it via an email attachment. You can use the export chat feature to copy the chat history from an individual or group chat.

To do that, you can start by opening the individual or group chat that you want to copy, tap “more options” or the three vertical dots image, and then click “more” and “export chat”. Choose whether to export with media or without media. An email will be composed with your chat history attached as a .txt document.

If you choose to export your chat history with the media, you can send up to 10,000 latest messages. However, without media, you can send 40,000 messages. These constraints are due to maximum email sizes.

As quoted from kompas.com, the platform will no longer work on these phones after Monday:

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

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