Some problems may require that the phone is restored while it is in DFU (device firmware upgrade) mode. Doing so may resolve issues with Exchange, an inability to send and receive MMS messages, device slowness and other problems. In other words, the proximity sensor does derece properly engage, and the https://www.openlearning.com/u/zachariassenjama-spvx0a/blog/EnIyiTarafYurtdnaParaTransferiBankaNaslYaplr