I removed tiny (15mm x 3mm) speaker from my (not working) cordless phone and it's gives me resistance of 167 ohm.
Is it reasonable at all?
YES. Could be. If its a very small speaker
A phone speaker is held flat to the ear, it doesn't need to be powerful.
MarkT:
A phone speaker is held flat to the ear, it doesn't need to be powerful.
It does if it provides a "Loudspeaker" function or is used as the ringer; they are really noisy!
Albeit some mobile phones have a second speaker (usually on the back) for those functions.
Even so, 167 ohms is surprisingly high - most "bud" earphones are 30 ohms.
This is or was a cordless phone, not a mobile, eh?
Yes, I removed it from ear part of handset on cordless phone.
Is there any simple way to test or verify this ear piece speaker?
167 ohms is surprisingly high - most "bud" earphones are 30 ohms.
I agree. Could this be a magnetic non-speaker transducer? Some (many?) phones are designed to "work with hearing aids", which means that they somehow simulate the old-style phone earphones WRT magnetics. (or it could be a special speaker specifically designed for such compatibility.)
http://transition.fcc.gov/Bureaus/Common_Carrier/FAQ/faq_hac.html
flash_os:
Yes, I removed it from ear part of handset on cordless phone.
Is there any simple way to test or verify this ear piece speaker?
Yes, measure the resistance - if its shorted or open its broken, otherwise
it probably works fine...
flash_os:
Is there any simple way to test or verify this ear piece speaker?
You already verified it.
Anything other than zero or infinite Ohms means it's probably working.
MarkT:
Yes, measure the resistance - if its shorted or open its broken, otherwise
it probably works fine...
I was kind of assuming that saying "it's gives me resistance of 167 ohm" indicates that was in fact, the measurement on the multimeter. It's not a usual specification.
It should click when you touch the meter prods to the terminals.
Paul__B:
It should click when you touch the meter prods to the terminals.
That, too.
(Or use a battery...)
Paul__B:
MarkT:
Yes, measure the resistance - if its shorted or open its broken, otherwise
it probably works fine...I was kind of assuming that saying "it's gives me resistance of 167 ohm" indicates that was in fact, the measurement on the multimeter. It's not a usual specification.
It should click when you touch the meter prods to the terminals.
You missed the implicit smiley 
MarkT:
You missed the implicit smiley
Apparently.
Incidentally, checking the resistance does not demonstrate functionality if the voice coil is glued in the gap.
