I can't input NTT docomo number in the sub-line field on the online ...

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件名	I can't input NTT docomo number in the sub-line field on the online application screen for "Omatome Seikyu Service (combined billing method)."
回答	You can't register NTT docomo lines as sub-lines with "Omatome Seikyu Service (combined billing method)." If you have multiple docomo lines, please apply for "Ikkatsu Seikyu Service (single billing service)." Click "here" for applications for Ikkatsu Seikyu Service
カテゴリ	よくあるご質問 > FAQ for foreigners > FAQ English
関連FAQ	Can I choose the main line for "Omatome Seikyu Service (combined billing method)"?Is it possible to apply a line from a company other than NTT docomo as a main line? I want to have the monthly billing issuing fee waived for "Omatome Seikyu Service (combined billing method)" which main line is with NTT docomo. (I want to stop the paper statement.) I can't select NTT docomo in the field "代表回線以外 (except the main line)" on the online application screen for "Omatome Seikyu Service (combined billing method)."