Taiwanese mobile firm BenQ Mobile has filed for insolvency. Parent company BenQ said in September it would stop funding the mobile business.

But questions remain as to the fate of the German business. A spokesman for insolvency administrator Martin Prager told Reuters that he was still negotiating with several interested parties and: "if necessary, he will still be negotiating on December 31."

Prager said in October that radical restructuring was the only way the company could survive.

BenQ press releases are here.