Many mobile carriers offer services specifically

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While you can't directly link a single phone number (SIM card) to multiple devices simultaneously in the way you might imagine (like having your main phone number active on two smartphones at once with full calling and texting capabilities on both), there are several effective methods to achieve a similar outcome, allowing you to receive calls, texts, and use your phone number's associated services across various devices.

Here's how to effectively "link" your phone number to multiple devices:

1. Carrier-Provided Multi-Device Services (eSIM, NumberShare, etc.)

designed for this purpose. These often involve an eSIM or a "NumberShare" type of service.

eSIM (Embedded SIM): With eSIM technology, your phone number profile is guatemala phone number list stored digitally on your device, rather than on a physical SIM card. Some carriers allow you to have your primary phone number active on multiple eSIM-compatible devices (like a smartphone and a smartwatch, or even a tablet) simultaneously. You would typically subscribe to a plan that enables this, and calls/texts to your main number would ring/appear on all linked devices.
NumberShare/OneNumber: This is a branded service offered by various carriers (e.g., AT&T NumberSync, Verizon NumberShare, T-Mobile DIGITS). It allows your calls and texts to your primary phone number to ring and appear on other connected devices like smartwatches, tablets, or even other smartphones, without needing a separate SIM card for those devices. This is often achieved through your carrier's network and specific app integrations.
How it works: You usually enable this through your carrier's online portal, app, or by visiting a store. You'll link your primary device to the secondary devices, and the carrier's network handles the routing of calls and messages.

2. Wi-Fi Calling and Texting (Built-in Features)

Most modern smartphones have built-in Wi-Fi Calling and Texting capabilities. While this doesn't directly "link" your number to another device, it allows you to use your primary phone number for calls and texts over Wi-Fi on a device that may not have cellular service.

On your primary phone: When you're in an area with poor cellular reception but good Wi-Fi, your calls and texts will automatically route over Wi-Fi, using your regular phone number.
On other devices (via primary phone): Some phone ecosystems (like Apple's Continuity features) allow you to make and receive calls and texts on your iPad, Mac, or Apple Watch, as long as your iPhone is nearby and connected to Wi-Fi. This leverages your iPhone's cellular connection and sends the calls/texts to your other Apple devices. Android equivalents also exist, often through manufacturer-specific "link to Windows" or similar features.
How it works: Enable Wi-Fi Calling in your phone's settings. For cross-device continuity, ensure all devices are signed into the same account (e.g., Apple ID, Google Account) and have the necessary continuity features enabled.

3. Messaging Apps with Multi-Device Support (WhatsApp, Telegram, etc.)

Many popular messaging apps allow you to use your phone number to register and then access your chats across multiple devices.

WhatsApp: You can link your WhatsApp account to multiple "companion devices" (other phones, tablets, or computers via WhatsApp Web/Desktop). Your messages sync across all linked devices, and you can send/receive from any of them.
Telegram: Telegram is renowned for its multi-device support. You can be logged into your Telegram account on numerous phones, tablets, and computers simultaneously, and all your chats will sync seamlessly.
Other Apps: Signal, Viber, and many other messaging platforms offer varying degrees of multi-device functionality, often allowing you to access your conversations on a desktop client or a tablet once linked to your phone number.
How it works: Typically, you'll register the app with your phone number on your primary device. Then, on other devices, you'll scan a QR code or enter a confirmation code generated on your primary device to link them.

4. Google Voice (and similar VoIP services)

Google Voice provides you with a free phone number that you can link to your existing phone number(s) and use across multiple devices.

Call Forwarding: You can set your Google Voice number to forward calls to multiple linked phone numbers (your primary cell, a home phone, etc.).
App Access: You can use the Google Voice app on various smartphones, tablets, and computers to make and receive calls and texts using your Google Voice number.
Voicemail: All voicemails are accessible from any linked device.