関連ワード:  cannot use mobile data while on call    cannot use mobile data while on call iphone    can t use mobile data while on call    can t use mobile data while on call iphone    can t use mobile data while on call samsung    can t use mobile data while on call vodafone    can t use cellular data while on call iphone    can t use cellular data while on call    can't use mobile data when on a call    can i use mobile data while on call