Hear MP's not changed communication device (10)

I believe the answer is:

smartphone

'communication device' is the definition.

'hear mp's not changed' is the wordplay.
'changed' indicates an anagram.
'hear'+'mps'+'not'='hearmpsnot'
'hearmpsnot' is an anagram of 'SMARTPHONE'.

(Other definitions for smartphone that I've seen before include "Multi-purpose mobile device" , "Clever device" , "Advanced electronic hand-held device" .)

I've seen this clue in The Telegraph.

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