About Network Signal Guru. Network Signal Guru (NSG) is a multi-functional Android OS based tool for voice and data service quality troubleshooting, RF optimization and engineering field work. It supports all wireless network technologies worldwide, and covers multiple mobile layers as well as data stack in real-time. NSG provides extensive test functions for voice, data tests to assess and reflect the real end-user experience of QoS within a mobile network. NSG covers all test functions and latest technologies such as: GSM, GPRS, EDGE, UMTS, HSDPA, HSUPA, CDMA2000, EVDO, LTE (FDD & TDD). NSG integrates full recording and decoding of protocol layers on the supported technologies (3GPP, Layer2, Layer3 and SIP) and direct decoding of Layer 3 signaling and data protocol packets on cell phones. NSG Map offers comprehensive and valuable benefits to combine outdoor and indoor measurements, which reduces the complexity of in locations such as subway, malls or airports. Generally, NSG provides two optional modes for end users, general and advanced modes. In advanced mode, NSG needs two prequisite conditions before you are using this tool. first advanced mode only support Qualcomm chipset models. Secondly NSG need cell phone a super user access within your android phone and you have to root the device before NSG is running. In the advanced mode, test user can discover handreds of parameters in different network technologies provided by NSG and that can help us to know the wireless better. If device cannot run in advanced mode, NSG will fallback to general mode. Under this mode, all the Android OS running devices can provide NSG information for test users including radio parameters, cell location and even advanced LTE parameters. What that NSG team is doing right now is to lower the cost of network maintenance, optimization and engineering processes. Currently a lot of test tools provided in the market are very expensive, some of those are much more expensive than a basestation. That's why NSG Team launch this app. Please help us more users and carriers can get benefits from this APP. Band Locking enables you to allow your phone to only search for service on the bands that you specify. This is important if you are trying to identify specific coverage in specific locations, or do other testing with your phone. Additionally, if you find that one band is severely congested, you can force your phone to stay on a different particular band. Network Signal Guru is a new app that gives TONS of information on the cellular networks that you are connected to. Thanks and Best Regards, NSG Teaminfo@qtrun.com.