Sony has based its fightback on smartphones, PlayStation games, and imaging sensors for mobile devices as well as digital cameras. But analysts have mixed views on their long-term prospects, and many have been frustrated by the slow pace of progress in other businesses. "One thing is clear, electronics remains a bleeding Achilles' heel," said Atul Goyal, an analyst at Jefferies in Singapore who has a 'hold' rating on the stock. "Sony continues to struggle without an exit strategy from electronics."