BT used 100m Post-it notes for its Make a Note campaign to promote its 118 500 number, which it hopes customers will use when 192 is scrapped on 24 August.
Around 5m Post-it pads will be delivered to homes in the UK, and they will also appear on magazines and takeaway packaging.
The campaign, which was overseen by creative agency St Lukes, also includes 8,600 street-level posters, 3,900 giant posters and 47 special build sites.
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