People waiting to charge their mobile phones
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The 'vital' role of mobile phones for refugees and migrants

7 September 2015 Last updated at 11:36 BST

Large numbers of refugees and migrants have been passing through Keleti train station in Budapest in Hungary on their way to north and western Europe.

In addition to food and water, another essential is being provided at the station - somewhere for people in transit to charge their mobile phones.

As the BBC's Gavin Lee has been finding out, the phone can be an important lifeline in the long journey to other countries.