Dec. 28, 2011 at 4:47 PM ET
Updated at 3:06 p.m.
For the third time this month, Verizon Wireless is experiencing data service outages for some users of its 3G and 4G networks in various places around the country.
"We are investigating reports of some customers experiencing trouble accessing the 4G LTE network," said a spokeswoman for Verizon. "The network itself continues to operate and all customers continue to be able to make calls, send text messages and utilize data services. 3G devices are operating normally."
But some users of both the carrier's 3G, or third-generation, and newer 4G, fourth-generation, wireless technology say they're having problems.
"No 4G or 3G in Indianapolis," posted "jstipe" on Verizon's online support forum. "At least I got a recording when I called Customer Service stating that they were aware of the problem and were actively working on it."
In Houston, posted "wstein86," 3G is returning on and off. ... Why am I paying for a 4g service and america's supposedly MOST RELIABLE network again?"
And "zanth07" from Columbia, Maryland, said his area "has been without 4G for most of the day, 3G comes up for a few minutes and goes back down again. This is the 3rd time I know of this month that this has happened to me. I've been a loyal customer of Verizon for many years because of their reliability, and now 3 months into a new 2 year agreement with what is right now a really expensive paper weight, I'm wondering how wise of a choice this was."
On Dec. 21, the carrier responded to complaints about 3G and 4G outages, although it said 3G devices were not affected. Nor did the company explain the cause of the outage. Verizon also had a 4G data service outage on Dec. 6.