I am leaving this review because US Mobile’s customer service representative (Attiq) declined to provide any direct feedback channel and insisted that public forums were the only way to share my experience. I genuinely hope to update this review with a more positive rating and customer centric review after my concerns have been reviewed. The online interface for adding a new line is clean and user-friendly. I was able to request a number port from AT&T with minimal effort, and the transfer was completed within minutes. However, after activation, the system prompted me to install an eSIM—only for me to discover that my device was not eSIM compatible. There was no option presented at that point to order a Starter Kit or associate the new line with a physical SIM. Chat support directed me to a page that I could order a Starter Kit and informed me I could contact them again to manually associate my device—a process that leaves me without phone service and missing all calls until the SIM arrives. This contradicts the recommended procedure and should have been made clear before porting my number. The guidance provided is negligent and misleading: "SIM Card Starter Kit not needed for most phones, which support instant activation on eSIM. Not sure? Try eSIM first. You can order a Starter Kit later, at any time." This suggests that trying eSIM first is the best approach, when in reality, the only option presented for anyone without an eSIM-compatible is to contact customer service to learn that they will lose service until they obtain and configure a physical SIM. US Mobile should clearly warn customers before porting their number that service will be interrupted if their device does not support eSIM, or provide a means of verification of compatibility before porting the number instead of encouraging a "try first" approach. My experience would have been magnitudes better had I been advised to confirm compatibility and wait for SIM. I hope US Mobile improves its communication on this issue, and I would be happy to update my review if steps are taken to address it.