If you want a real USA number eSIM, my understanding is the Ultra Mobile PayGo plan ($3/month) costs less than Tello and provides a genuine US cellular number on the T-Mobile network (non-VoIP), ensuring OTP text authentication codes from major US banks are never blocked. The plan includes 100 SMS messages, 100 minutes, and 100 MB of data per month. Because it operates as a standard cellular line rather than a virtual service, it avoids any possible security rejections of VoIP numbers. To set it up abroad, purchase an activation code online, complete setup via their portal (paygo.ultra.me/activate), and install the eSIM profile directly onto your device. Log into your online account settings to register a US E911 address, which enables global Wi-Fi Calling. Once configured, incoming 2FA texts deliver over Wi-Fi to your cell phone anywhere in the world without incurring any international roaming fees. Unlike many international telecom providers, standard prepaid U.S. carriers like Ultra Mobile do not require identity verification, passport scans, or government identification to purchase or activate a line. During activation, you only need to provide a name, email address, payment method (credit/debit card), a U.S. billing zip code (used to assign your local phone number), and a U.S. address for E911 Wi-Fi Calling registration.
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