How to parse single xml node in windows phone?

Questions about mobile OS security: what security issues exist in out-of-date mobile OSes?  Why can't the Android and Windows Phone OSes be kept up-to-date for several years?  Are there any mobile OSes that are or will be kept up-to-date for several years?

• I plan on buying a smartphone sometime soon.  It will be my first smartphone.  I’ve been paying attention to smartphones for the past couple of years, and the list of phones I’m considering includes Android phones and Windows Phone devices.    The Nexus series of phones made my list for consideration because they are always first to receive updates.  But the last time I checked, Google was not planning to update the Nexus S to Android 4.2.  Worse, the Open Handset Alliance only aims to keep phones up to date for 18 months following their release, and if I recall correctly, Microsoft has set similar goals for Windows Phones.  (Again, all of this was from the last time I checked, which was a while ago.  This information might be outdated.)    Why can’t phones be kept up to date for longer than that?  If I go out and buy a five-, six-, or seven-year-old used desktop or laptop, I’ll probably still be able to update it to the latest version of Windows.  Why can’t phones be the same (whether we are talking about Windows Phones, Android, or anything else)?    The reason that this issue bothers me is I am worried about security.  If I have an Android phone or Windows Phone that is more than 18 months old, and security updates released by Google or Microsoft aren’t available for my phone, doesn’t that expose me to security risks (malware, etc.) - the same kind of threats that exist with PCs that haven’t had the latest security updates installed?  And even if that phone is still within its update lifecycle, if it is an Android phone other than a Nexus, there is a delay between when Google releases an update to OEMs and when OEMs and carriers make that update--or a customized version of it--available to users.  During that interim time, aren't users' phones vulnerable because they have not yet been patched/updated?  A few more questions:  - Are there any mobile OS developers that have committed to keeping the phones and tablets that run on their OSes up to date for a long period of time, as in maybe five to ten years?  - Are there any OEMs and carriers that have made the same commitment?  - Even if the answer to both questions is 'no', are there any companies that have a reputation for quickly getting security updates to users, even if they will only keep updating those devices for a limited or brief amount of time?  Side note: I forgot to mention that I am in the U.S.  Any help is appreciated, especially regarding my security concerns.

• Answer:

  Android and updatesThe only explanation for updates not coming to e... You must be signed in to read this answer.Connected to GoogleConnected to FacebookBy continuing you indicate that you have read and agree to the .  Loading account...Complete Your ProfileFull NameChecking...EmailChecking...PasswordChecking...By creating an account you indicate that you have read and agree to the .