Nokia Siemens Networks’ search for a willing buyer for a stake in the ailing JV appears to have staggered to a halt, with reports emerging that Nokia and Siemens have agreed to rather invest more of their own cash in an effort to revive the partnership’s fortunes. Reports in the Wall Street Journal suggest that plans to sell a controlling stake in the venture to a consortium including private equity investors were about to fall through, with Reuters quoting telecoms analyst Earl Lum as saying that “Any potential investor would need to see some light at the end of the tunnel with regard to profitability for NSN.”