Microsoft says that the completion of the purchase of Nokia’s handset business will be delayed until the end of April. The Redmond giant’s buyout of Nokia’s devices and services group was first announced in September 2013. Set to go ahead for $5 billion, with roughly $2.17 billion spent on licensing Nokia patents, Microsoft will not only acquire Nokia’s handset-making business once the deal is finalized, but will also be able to use the firm’s patents and mapping services.