Spark New Zealand Mobile
The XT Network was a brand name for a UMTS and LTE mobile network run by Spark New Zealand (formerly Telecom New Zealand). The network was initially built nationwide on WCDMA/UMTS 850 MHz, with 2100 MHz infill in major urban areas. The UMTS network is HSPA+ enabled, with a maximum downlink transmission rate of 21.1 Mbit/s and an uplink rate of 5.2 Mbit/s attainable for capable hardware. HSPA+ has a theoretical maximum of 56 Mbit/s download speed and 22 Mbit/s upload speed. Then under Spark 4G LTE is being built out. The network is not 2G capable, Telecom never operated a public GSM network.
After lengthy internal and corporate trials, the XT Network was launched to the public on 29 May 2009, at 7:30 am. The network was the successor to Telecom NZ's CDMA mobile network. With the shutdown of CDMA in 2012, XT is currently the company's sole mobile network.
The name "XT Network" is no longer used. It has been called: "XT Mobile Network", then "The Smartphone Network" under Telecom, and now "Spark Mobile" under Spark.