这是Amazon 用户写的评论,告诉用户怎么开通H2O 的SIM 卡: How to use this SIM with locked AT&T iphone 5S that will use a new phone number By Joe on October 12, 2014 Verified Purchase This info might help others choosing this option for an iphone. 1. The sim works in an AT&T locked iphone 5S. 2. Once SIM is installed you need to go to h2owirelessnow and register for an account. You can't activate online because the page will ask for an activate PIN. 3. Call the customer service number from another phone and indicate that you want a new phone number and want the "minute plan". You then enter the actafast number for the sim and the IMEI number for the iphone and some other needed info and in a few minutes your phone and number will be activated. Probably need to restart phone at this point as well. 4. Go to h2owirelessnow, log in and purchase minutes under recharge by credit card. I chose the $10, 90-day plan. Check it all out by making a call.