Yes it is true. All you have to do is to particpate in the Nokia ‘Take Back’ green campaign bandwagon and get rid of your old, abandoned mobile phones.
For every handset that is displosed in the recycling bin found at any Nokia priority dealer outlet, the Gloabl telecom major will plant a sapling as part of this green initiative. And to boot, you get a gift too. This campaign is being rolled out in India in phases and will involve qualified recycling to ensure proper end of life treatment of used devices.

In fact, a recent survey reveals that a majority of old phones just lie idle in homes, maybe bcos they passed their utility value perception of the owner or maybe the new 3G phones have caught the fancy of the owner necessiating a jump to new technology enabled devices. Only maybe 3% recycle their phones and pitiably the majority of phone users are not really aware that a phone can be recycled (84% in India – real beef here ).Close to 66-80% of a phone can be recycled. You can also drop off accompanying batteries and chargers. But do make sure you remove your SIM and memory cards before taking advantage of this green initiative.
Interesting info! I will try this with one phone that is lying waste. Will update you on how it happened.