If you take a telephone instrument from the US to India, most likely caller id feature does not work when the telephone set is plugged to Indian phone outlet. The caller id systems in India and US are different. Phones bought in Asian countries normally work in India. However, there is a way to work around the problem. There is a gadget called caller id converter which helps caller id systems to interoperate. Search for "EX-220" on Google and you can find where to buy such caller id converter.
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