The main problem is the lack of TD-S handsets: existing models must be completely redesigned to work with TD-S networks.

主要问题是因为缺少TD-S手机：现有的手机必须重新设计才能接入TD-S网络。

youdao

If my cellphone model is TD-SCDMA, then could I use [other networks] when I go abroad?

如果我的手机制式是TD - SCDMA，那么当我出国的时候能够使用其他制式吗？

youdao

This network standard, called TD-SCDMA is incompatible with the 3G networks of most other carriers.

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