Come January one, Delhi Metro will introduce a new round-the-clock helpline number that will allow commuters to register their complaints and suggestions regarding services.

The new helpline number '155363' will replace the existing '128128' from January one and this number can be accessed even from mobile phones.

Delhi Metro decided to change the helpline number after complaints from commuters that they were not able to call the number from mobile phones.

Mobile users and callers even residing outside Delhi can avail the service by calling on the new number 011-155363.

However, the calls made on this service are not toll free, DMRC spokesman Anuj Dayal said.

The service will be especially of use to the physically challenged commuters who can call on this number and seek assistance from the Metro staff by informing in advance which Metro station they would reach so that they can be helped.

Delhi Metro provides wheel chair facility to old and physically challenged commuters in all the Metro stations, Dayal said.

He said every effort will be made by DMRC for providing easy access and speedy solutions to public queries and complaints.

He said the existing number '128128' will become non-functional from the same day.

"The new number has been provided with caller ID and recording facility. The officials concerned will be immediately informed about the complaint to ensure that a quick solution is provided to the same," Dayal said.

The online customer care cell is working from Delhi Metro's Shastri Park depot since October 2008 and answers on an average about 150 calls in a day pertaining to train timings, feeder bus services, fares, Metro routes etc.