Suppose you are Sam Jefferson, from Neutech, and you have got an email for your client, Leeway. Leeway mentioned in the email that some users report that the positioning function is not working, and sometimes the system freezing happens. Please write an email to Leeway, offering solutions (system upgrading, software updating, etc.) and explain the possible reasons.提示:你是Neutech公司研发团队的Sam Jefferson,收到对方公司员工Leeway来信，对方在信中询问用户在使用软件的过程中发现定位功能无法使用，偶尔还会出现软件卡顿和手机白屏的问题。请给对方回信，提供解决办法（升级软件，并将手机的系统进行升级），解释可能的原因。