# A compatible phone. A clearer first connection. Check the actual device before the customer buys or installs a plan. Model, country of purchase, carrier lock and active-line limits all matter. Match those details to the service and give the customer an installation path they can complete. [Check device and coverage requirements](/docs/guides/esim/device-and-coverage) [Discuss your requirements](/demo?product=esim&source_page=%2Fproducts%2Fesim%2Fdevice-compatibility) [Explore the eSIM platform](/products/esim) Prepare the phone FIELDNOTES · DEVICE CHECK Illustrative readiness steps. This page does not detect or verify your device. ## Check the device you have in hand. Use the manufacturer’s guidance for the exact model and market variant. A product family name is not enough to establish eSIM support. Confirm the operating system and any device requirements attached to the selected plan. ### Carrier lock A phone locked to its original carrier may refuse another carrier’s eSIM. Ask the current carrier about unlocking before purchasing a service the phone cannot use. ### Stored profiles and active lines The number of profiles a device stores can differ from the number of lines it can use at once. Check active-line limits and which line will handle data, calls and messages. ## Give the customer a path on the same phone. Use the supported installation link when available. Keep QR and manual setup available through the private customer journey. Explain how to display a QR code on a second screen when scanning is the appropriate method. ### Prepare the connection Use a working internet connection to obtain the profile. Confirm the plan’s activation trigger before installing ahead of travel. ### Keep setup private Installation details grant access to the profile. Share them through the authorized installation flow and keep them out of public screenshots or ordinary analytics. ## Verify the selected line after installation. Choose the intended data line and apply the plan’s roaming instructions. Test the services included in the offer. Successful installation is a device result; it does not establish that mobile data, calls or SMS are working. ### Changing phones Confirm the provider’s replacement or transfer process before removing a profile. Reusing an old activation code on another device is not a guaranteed transfer method. ### When the phone refuses setup Keep the device model, installation method and exact error with the support request. Check the step reached before recommending deletion or another purchase. ## Check the manufacturer’s guidance - [iPhone travel and eSIM guidance](https://support.apple.com/en-gb/118227): Check carrier lock and the available installation arrangements. - [Pixel carrier compatibility](https://support.google.com/pixelphone/answer/7107188?hl=en): Review unlocking and carrier compatibility for your Pixel phone. ## Questions before you choose ### Can this page detect whether my phone is compatible? This page explains the checks. Confirm the exact model, market variant and carrier status with the manufacturer and the selected provider; the illustration does not inspect your device. ### Does an eSIM-capable device have to be unlocked? To use a different carrier’s service, the device must permit that carrier. Check lock status and the selected plan before purchase. ### Can I keep my existing line? Many devices support more than one line, but active-line limits and data selection depend on the device and carrier. Confirm the combination you intend to use. ### Should I delete a profile when installation fails? Check the service’s recovery and reinstall rules first. Deleting a profile can remove the setup needed to recover the existing plan. ## Prepare the next step - [eSIM installation](/products/esim/installation): Help customers install on their device and get connected with clear guidance. - [Coverage and networks](/products/esim/coverage): Match the plan to the destination. - [Travel eSIMs](/products/esim/travel): Bring destination data, installation and top-ups into your travel experience. - [Connectivity operations](/products/esim/operations): Bring orders, billing, network status and support into one service history. ## Prepare the device journey before launch. Review your device mix, installation methods and support process. Work through the first connection and a recoverable setup problem with our team. [Discuss your eSIM requirements](/demo?product=esim&source_page=%2Fproducts%2Fesim%2Fdevice-compatibility) [Read the readiness guide](/docs/guides/esim/device-and-coverage) ## Related resources - [eSIM connectivity guide](/docs/guides/esim/overview) (docs) - [What is an eSIM?](/explained/esim/what-is-an-esim) (answer) [Get an implementation brief](/learn/workspace?topic=esim)