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You can try ours:
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Our drop downs actually work, and it will save your form state, even if you refresh, or switch devices (you can recover your old form data by logging in with the email you entered).
It's free if your arrival date is within 72 hours, and if the government site is having issues we automatically resubmit until a successful attempt.
If you wish to submit earlier than 72 hours then there is a $8 fee. Also you can easily obtain an eSIM, or FastTrack services at the last step.