Talk:Euro4/@comment-168.94.245.18-20150404181911/@comment-24682153-20150404213901

No. Just register it online first by giving any real German address (maybe your accommodation address later in Germany). You'll have a roaming connection after a few hours on AT&T or T-Mobile US. Log-in too and create an online account with Ortel and add enough credit to buy the Cross option later. To do so, you will need at least a €20 balance. Ortel may be picky which out-of-Europe credit card you use. If yours doesn't work, use PayPal or Paysafecard which are sold in the US too. You'll have no costs until you actively use your line, which you shouldn't do in the US.

Just before you fly to Europe, activate the Cross option online and you'll have the package running right away, active before you land in Spain (and the rest of the EU) for 30 days. I checked and suceeded in activating it outside of Germany in a roaming country too. So I can confirm, that it should be no difference where you are for registration or activation. To check whether it's active, you'd better have roaming, but with Ortel you'll have in the US, but not for the discounted Cross rate of course.