Name of service that tells you when you don't get a call from KT

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I use KT Olleh mobile phone In the past, when I was on a regular mobile phone, there was a service that told me which number I got a call from by text message later if my phone was busy or my phone was off

356 4 7 years ago

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pu1. There is a service called Catch Call provided by KT. Text me the phone number for all calls you haven't received. Even if the caller hangs up without leaving a phone number, the caller's number can be checked by text message. The price is 550 won including VAT.

2017-12-19

pu2. Thank you

2017-12-19

pu3. http://product.olleh.com/wDic/productDetail.do?Ite...
It's detailed here

2017-12-19

pu4. Thank you

2017-12-19

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