| Number of Mobile Connections Ported-in and Ported-out of Mahanagar Telephone Nigam Limited (MTNL) in Delhi and Mumbai in Hindi Belt of India (20.01.2011 to 31.03.2011 and 2011-2012 to 2021-2022) | |||||||||
| Year | Ported in | Ported out | Ratio of Port out to Port in | ||||||
| Delhi | Mumbai | Total | Delhi | Mumbai | Total | Delhi | Mumbai | Total | |
| 20.01.2011 to 31.03.2011 | |||||||||
| 2011-2012 | |||||||||
| 2012-2013 | |||||||||
| 2013-2014 | |||||||||
| 2014-2015 | |||||||||
| 2015-2016 | |||||||||
| 2016-2017 | |||||||||
| 2017-2018 | |||||||||
| 2018-2019 | |||||||||
| 2019-2020 | |||||||||
| 2020-2021 | |||||||||
| 2021-2022 | |||||||||
