The domestic Chinese market was not able to support homegrown TD-SCDMA without the silicon manufacturing restrictions that now exist for Chinese companies, what makes you think that a company with rapidly outdating chip designs and access only to domestic silicon fabs which are trapped on older 14nm+ processes is going to be able to compete outside of the low end of the budget segment?

Even Intel had trouble surviving on 14nm, hence all the contra-revenue spent to directly subsidize Intel tablets (whether they were $100 HP Stream Windows tablets, or $50 Walmart special Android tablets) to try and not get locked out of that space.