Please check if your device supports eSIM before purchasing, you can check your phone's device information in Settings, and if it has a 32-digit EID number, then your device is eSIM-capable. Important Note: Please confirm the delivery address before placing an order, and consider the timeliness of logistics, please purchase this product 15 days before the travel date. eSIM Installation Steps:visit website redeem.gteSIM.com | enter the Redeem code in eSIM manual for generating an eSIM QR code | Go to your device Settings > Cellular or Mobile Data > Add Cellular Plan | Scan the QR code and tap Add Cellular Plan | Choose Secondary Label and change the name to Travel | Select the option for 'Use Travel for cellular data only' and tap Continue | Select the option for 'Use Primary as the preferred line' and tap Done | Data roaming must be enabled to use the eSIM Caution: You cannot use multiple phones to scan a same QR code more than once. When you scan the QR code for the first time, the binding has been established with your phone and you cannot use this QR code again with other phones. In addition, if one QR code is scanned more than the limit, the scanning will not work. Customer Service: 1. Online customer service: Monday to Friday 9am to 6pm (BTS), English and Chinese bilingual service; 2. WhatsApp customer service: Monday to Friday 9am to 4pm (BTS), English and Chinese bilingual service. GteSIM is committed to customer satisfaction. We actively listen to customer needs, continually refining and enhancing our services to ensure users consistently receive experiences that surpass their expectations.