Accelerate your 5G rollout
Efficient lab testing, initial tuning, cluster acceptance and network troubleshooting capabilities ensure faster time-to-market of your 5G network.
Infovista TEMS · Mobile network testing
TEMS™ Investigation Mobile Network Drive Testing
In-depth network testing and troubleshooting
Optimize your subscribers' user experience by testing your network from their perspective.
- 0
- Years as market leader
- 0
- Countries & regions
- 5G NR
- Native support
- IoT · RedCap
- Device testing
Reliable 5G network testing
Verify, optimize, and troubleshoot your mobile network
TEMS™ Investigation is a powerful drive testing solution for initial tuning, 5G site acceptance, software upgrade verification, new feature validation, network troubleshooting and more.
Through our partnerships with device and chipset vendors we support the latest technologies, features and devices your customers are using, including IoT and RedCap devices. This means you can not only reliably test and improve your subscriber quality of experience, but you can also accelerate your 5G roll-out and gain a competitive edge.
- Device and chipset vendor partnerships
- IoT and RedCap device testing
- Access to Layer 3 messages
- Native and OTT voice quality
Key benefits and features
Why teams standardise on TEMS Investigation
Be in control of your testing
Powerful device forcing features, scripting and workflow integrations enable efficient network testing and analysis.
Understand your customers' experience
Testing of native and OTT voice quality, OTT applications and user interactivity ensure a comprehensive view of your subscribers' experience.
Reliably test with the devices your customers use
We partner with key vendors to ensure faultless support for the latest chipsets and 5G devices, including access to Layer 3 messages.
Align with global best-practice
TEMS Investigation delivers standards-based testing by employing the latest test methodologies and recommendations from ETSI and ITU-R.
Get peace of mind from a proven solution
For over 30 years, TEMS products have been recognized as the leading network testing solutions by mobile network operators and vendors worldwide.
User experience testing
Understand mobile gaming user experience
Find out how to test user experience interactivity for one of the most rapidly growing application areas: cloud gaming over mobile networks.
Read whitepaperUse cases
Three ways teams put TEMS Investigation to work
01
Network initial tuning and rollout acceptance
Simplify pre-launch performance assessments with pre-defined test sequences
When you are rolling out a new 5G network, a new technology overlay, or expanding your network coverage footprint, you need to assess your pre-launch performance. TEMS Investigation provides you with a complete set of predefined test sequences to simplify your on-site tests. It supports multiple devices, all network technologies and the ability to use scanners for detailed RF measurements to meet your field test needs.
Download datasheet
02
Network troubleshooting and optimization
Deliver a winning subscriber experience across the latest devices and major OTT apps
The quality of a subscriber's experience relies on your ability to identify and solve network problems quickly and reliably. TEMS Investigation's in-depth testing capabilities, including application and network testing, provide the insights you need to optimize your subscriber experience. Working with the latest smartphones (including the iPhone), chipsets, mobile OSes, and supporting all major OTT applications, TEMS Investigation has your future covered.
03
Network services testing and acceptance
Leverage in-depth UX testing to confidently roll out new services such as 5G VoNR
Launching a new network service, such as VoNR or NB-IoT, poses new network testing challenges you need to solve. Using TEMS Investigation, you can perform audio and video quality measurements (sQLEAR, POLQA, PEVQS), as well as testing popular social applications such as YouTube, Facebook and WhatsApp. When combined with your layer 1-3 tests, you have everything you need to successfully roll-out new network services.
Technology matrix
From 2G to 5G, with nothing left out
Live networks are never single-RAT. TEMS Investigation observes multiple RATs, bands and connection states within one session, leaving interworking and reselection issues nowhere to hide.
- 5G NRSA / NSA · FR1 / FR2 · Dual connectivity
- LTEFDD / TDD · LTE-A · NB-IoT · RedCap
- WCDMAHSPA · HSPA+
- GSMGPRS · EDGE
- CDMAIS-95 → EV-DO Rev. B
- OthersWi-Fi · LoRa
Quality of experience
Perfect KPIs — and the customer still hangs up?
Coverage and throughput are only process metrics. TEMS Investigation also makes what people hear and see a measurable score.
sQLEAR
Machine-learned voice QoE
A voice-quality algorithm trained with the latest machine-learning techniques and validated against ITU evaluation procedures. It fuses network parameters, codec/client information and reference audio to predict MOS, with proven accuracy for VoLTE EVS including full-band 24.4 kHz.
Device-agnostic → suited to cross-handset benchmarking
POLQA / PESQ
Standards-based voice quality
A separate licence option enables audio-quality measurement on LTE (VoLTE), WCDMA, GSM and CDMA; POLQA licences are tiered by the number of concurrent devices.
Can be replaced by on-device AQM for specific ODM handsets
PEVQS
No-reference video quality
A parametric no-reference model that scores video-service experience without an original reference clip, matching real playback in live networks.
New-generation PEVQS model since 26.2
VQmon
HTTP streaming quality
VQmon-based HTTP streaming quality measurement (separate licence), covering stalling, start-up delay and resolution switching across adaptive-bitrate playback.
Closes the OTT video experience loop
They trust us
Operators, regulators and vendors worldwide
Together, Accenture and Infovista are providing the most comprehensive mobile network benchmarking services globally.
Hakan EkmenGlobal Networks Lead, Communications Industry
CRA selected TEMS to not just monitor operators' compliance with their license obligations, but to ensure everyone visiting Qatar for a major event has the mobile experience that they expect.
Communication Regulatory AuthorityQatar
For operators that are racing to deploy new 5G sites, while continuing to optimize and expand existing network coverage, this new network testing approach is a gamechanger.
NokiaNetwork infrastructure vendor
We are using TEMS products with confidence in their guaranteed quality, measurement accuracy, and strong support. TEMS solutions are integral to driving our mission of delivering exceptional mobile network testing and optimization services in Vietnam.
Trinh Ba HaiCEO, Viet Tan JSC
Measuring end-user experience is a crucial tool not only to verify network performance, but also for informing decision-making around planning future network investments.
Zain JordanMobile network operator
Releases and what's new
Keeping pace with devices and standards
New handsets, new chipsets, new features — each quarter enters the test plan before it enters the field.
New VistaTest and TEMS releases
- Latest VistaTest and TEMS updates
- Updated list of supported TEMS devices
- Network testing insights from the field
New releases, launch of VistAI and VistaOne
- TEMS updates and expert blogs
- Launch of the agentic AI framework
- AI-enabled network and enterprise CX intelligence platform
More devices, faster dedicated mode, new PEVQS model
- Support for Apple iPhone 16 and Sony Xperia 1 VI series
- Payload ping reaches dedicated mode about 80% faster than a regular ping
- Support for the new PEVQS parametric no-reference model
- OTT interactivity testing with asymmetrical traffic patterns
Related products and solutions
Part of the TEMS suite
One collection layer, several ways to test, benchmark, monitor and analyse.
Product
TEMS Pocket
Walk test indoor locations and drone test hard-to-reach places
Learn more
Product
TEMS Paragon
Streamline your mobile network benchmarking campaigns
Learn more
Product
TEMS Sense
Proactively monitor your wireless network services end-to-end with active testing
Learn more
Product
TEMS Discovery
Turn your network test data into analytics and actionable insights for optimization
Learn more
Product
VistaTest+
Manage your network test projects with real-time control and analytics
Learn more
Solution
User Experience Testing
Accurately measure QoE for all native and OTT applications and services
Learn more
Solution
5G Solutions
Explore our portfolio of solutions covering the entire 5G lifecycle
Learn moreResources
Featured articles and publications
Solution brief
Automated root cause analysis with VistaTest+
Turn complex drive-test data into prioritized network issues and structured troubleshooting workflows with VistaTest+
Learn more NewsletterJuly 2026 | New VistaTest and TEMS releases
Explore the latest VistaTest and TEMS updates, supported TEMS devices, network testing insights, and more
Learn more InfographicWhy testing GenAI user experience is so imperative
GenAI is reshaping mobile usage with new traffic patterns, uplink demands and multimodal growth. Explore key data and why network testing must evolve
Learn more NewsletterApril 2026 | New releases, blogs, launch of VistAI and VistaOne
TEMS updates, expert blogs, success story, and the launch of our agentic AI framework and AI-enabled network and enterprise CX intelligence platform
Learn more Case studyImproving customer experience with core network monitoring by TEMS™ Sense
Detect network issues before customers do. Learn how TEMS Sense enables real-time monitoring, faster troubleshooting, and improved customer experience
Learn more Videoumlaut provides mobile network benchmarking services using TEMS™
How a benchmarking specialist runs network comparisons and reporting on the TEMS portfolio
Learn moreGet in touch
Prepared to unleash your network's full potential?
Talk to one of our experts to answer your questions and get a demo of TEMS Investigation with no strings attached. Submit your contact details and we will get back to you shortly.
We're looking forward to connecting!