Spark customers in central Auckland are complaining of problems making cellphone calls this morning.
The telco had warned of expected issues in the city - including a "possible three-day outage" - due to network maintenance.
An outage message on its website says: "Mobile customers in Auckland Central may experience a loss of Voice, Data & SMS services (between 24th October 2018 at 07:00 and 26th October 2018 at 22:00, Up to 2 days 15 hours) due to Network Maintenance."
![This message appears on Spark's website.](https://www.nzherald.co.nz/resizer/v2/5EU5Y7XYZU4QB4547IJQ3IEWT4.png?auth=1d7b19244e322d761614bdb5465c5495f5d64d84b2fc291fffa9027e1160a2ee&width=16&height=2&quality=70&smart=true)
Spark told the Herald: "The Spark website information is correct – however, it does not specify that this is a window for network maintenance – we do not expect the outage to last for that entire period.