Router 877 changing Ios

hi!
i dont know if it's the correct forum but i got a simple question that i would like to be answered.
Recently i brought a 877 adsl router with the advance security ios. I thought this ios supported 802.1q, but i don't think so. So i upgraded to advance ip services ios. This ios support 802.1q and vlan implementation. The router seems to work fine. Everything was configured through CLI.
My question: This upgrade can cause some kind of problem with router functionality? if so, which ones?
The configuration is very simple: no vpns and basic firewall configuration.
Thanks for your help.

Hi there,
IOS Upgrades Dont affect Router Functionality BUT the features available on the Device.
Min Flash Requirement is There as BackUp Images are Recommended. In case The New Image is Corrupt or things dont go as planned, We can Manually boot the Router from Rommon.
Its a Standard Practice in Production Environment so as to Maximize Uptime.
Regarding the Features Required the best Pactice is to Use Cisco Feature Navigator

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http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
~~~~~~~~~~~~~~~~~~~~~~~~~
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Fix For iOS 6 WiFi Problems?
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~~~~~~~~~~~~~~~
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<Email Edited by Host>

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Router 877 changing Ios

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