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Provided the user is accessing Signal on the same device, the first step is to open Signal Settings. If a user is unable to send or receive Signal messages (check this by using Note To Self), does not have access to their phone, or has reset their phone, they will not be able to migrate to a new phone number. Signal lets users change their phone number, provided that they have an active Signal account, and are changing their number while using the same phone. This is because linked devices do not have the same Signal account information as a smartphone. For those using linked devices, Signal unfortunately doesn't offer the ability to transfer chats from a linked desktop or iPad to a new phone. At the moment, Signal does not offer the ability to link Android tablets or multiple phones. Users can link either a desktop or iPad to their smartphone. Like WhatsApp, Signal also offers users the ability to link devices to their phone. At the moment, Signal does not offer cross-platform chat transfers, unlike apps like WhatsApp, which means users switching operating systems don't have any way to migrate their chats to a new device.
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Signal desktop users are also at a disadvantage, as there's no way to transfer chats to a new device. Android users can only move chats from one Android phone to another.
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For iOS users, Signal supports chat transfers between two iPhones, from an unlinked iPad to an iPhone, from an iPhone to an unlinked iPad, and from an iPad to an iPad.
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