Verizon Wireless said it has fixed problems with its high-speed U.S. wireless network that left customers unable to connect for about a day.

4G LTE up and running. Thank you for your patience, the venture between Verizon Communications Inc and Vodafone Group Plc wrote on its Twitter feed on Thursday.

Problems with Verizon's newest network, which is based on Long Term Evolution, a high-speed data technology, appeared on Wednesday, when the network suffered an outage that slowed data-transfer flows on some devices.

The company did not identify the cause of the outage. A Verizon spokesman did not immediately return a call for comment.

(Reporting by Sinead Carew; additional reporting by Helen Kearney; editing by Andre Grenon)