Nokia chief exec suggests its customers should buy $ 20 mobile as a backup . But none of these boast the 35-day battery life that would make them suitable for an always-on emergency standby . Stephen Elop says the 105 device has a standby battery life of 35 hours . Phone is part of Nokia 's strategy of targeting budget end of mobile market .
Nokia chief exec suggests its customers should buy $ 20 mobile as a backup . Stephen Elop says the 105 device has a standby battery life of 35 hours . Phone is part of Nokia 's strategy of targeting budget end of mobile market .