The key to whether mobile internet can become practical is whether the means of supporting mobile e-commerce are mature. There are issues such as mobile payment that need to be urgently resolved. Recently, the renowned e-commerce solution provider PayPal launched an application based on Google Android phones. This free program is currently available for use in the virtual store of Android Market and can integrate with the phone's contact list. This means that users can easily select recipients and send payments. Meanwhile, the program allows users to browse their payment history and view account balance information. Regarding security, Eric Duprat, a programmer for the mobile version of PayPal, said in his blog: "The technology we use in the mobile PayPal payment application is identical to the web version, so in terms of security, they are the same." If you want to learn more details, you can visit this blog post (English version):
https://www.thepaypalblog.com/2009/05/new-paypal-application-for-android/