Electronics major Sony launched waterproof premium smartphone Xperia Z1 for Rs 44,990 with an aim to double its share in the high-end mobile phone market to 20 per cent. Sony also unveiled next version of Smartwatch for Rs 14,990 which will be available in India from October. "We want to be No 1 in premium smartphone segment which are phones priced above Rs 30,000 and double our market share from about 10 per cent at present to 20 per cent by end of financial year 2014. Therefore we have to double our speed of innovation and here we are with Xperia Z1," Sony India Managing Director Kenichiro Hibi said. Xperia Z1 is available across stores from today with an installment option spread over 12 months at no cash downpayment, nil processing fee and interest, he said.