VoLTE Testing App. MOS Score, Codec & RTP Analysis
Measure voice quality in the field with real-time MOS scoring, codec detection, RTP jitter and packet loss analysis, SIP signaling capture and VoLTE call drop diagnostics. All from your Android device.
Used by RF engineers, VoLTE optimization teams and network operators worldwide. No lab equipment needed, test voice quality directly on the handset.
Key Facts. HiCellTek VoLTE Testing App
- MOS Scoring
- Real-time ViSQOL machine learning model, 1.0 to 5.0 scale, no reference audio needed
- Codecs
- AMR-WB, EVS (super-wideband/fullband), AMR-NB, detection and bitrate tracking
- RTP Metrics
- Jitter, packet loss ratio, round-trip delay, inter-arrival time
- SIP Signaling
- INVITE, 200 OK, BYE, re-INVITE, response codes and call setup time
- Call Drop Analysis
- Root cause codes, handover failures, radio link failure detection
- Platform
- Android 9.0+, Qualcomm Snapdragon
- GPS Tagging
- All metrics timestamped and geo-tagged for drive test correlation
Complete VoLTE Analysis Suite
Every metric you need to diagnose VoLTE quality issues, from codec negotiation to call drop root cause.
MOS Scoring
Real-time Mean Opinion Score using ViSQOL machine learning. No reference audio, no lab equipment. Scores are computed on-device and correlated with RF conditions for instant quality assessment.
Codec Analysis
Detect AMR-WB, EVS and AMR-NB codecs in real time. Track bitrate changes, codec switches mid-call and bandwidth adaptation events that impact voice quality.
RTP Metrics
Measure jitter, packet loss ratio and round-trip delay on the RTP media stream. Identify network congestion points that degrade voice quality below acceptable thresholds.
SIP Signaling
Capture and decode SIP INVITE, 200 OK, BYE, re-INVITE and error responses. Measure call setup time and identify IMS registration or session failures.
Call Drop Detection
Automatic detection of VoLTE call drops with root cause analysis: radio link failure, handover failure, IMS deregistration, RTP timeout and SIP session errors.
Quality KPIs
Dashboard with all VoLTE KPIs: CSSR (Call Setup Success Rate), CDR (Call Drop Rate), HOSR (Handover Success Rate), average MOS, jitter distribution and per-cell statistics.
How VoLTE Testing Works
From call initiation to quality report, HiCellTek captures every layer of the VoLTE stack.
Start a test call
Launch the app, tap Start VoLTE Test and place a call. The app captures SIP signaling and RTP media from the moment the INVITE is sent.
Real-time analysis
During the call, the ViSQOL model computes MOS scores every second. RTP jitter, packet loss and codec type are tracked continuously.
Correlate with RF
All voice metrics are correlated with RSRP, SINR, PCI and handover events. GPS tagging enables geographic quality mapping.
Export & report
Export the full call log with timestamps, KPIs and GPS data. Share with your team or upload to the HiCellTek Cloud for aggregated reporting.
VoLTE testing use cases
Drive test campaigns
Run VoLTE quality measurements during drive tests. Map MOS scores and call drops geographically to identify problem areas across the network.
Call drop investigation
Reproduce and analyze VoLTE call drops in the field. Correlate drop events with RF conditions, handovers and SIP errors to find root cause.
Network acceptance testing
Validate VoLTE quality KPIs (MOS, CSSR, CDR) after new site deployment, configuration changes or IMS upgrades.
Start testing VoLTE quality today
Get real-time MOS scores, codec analysis and call drop diagnostics on your Android device. No lab equipment. No expensive licenses.
Frequently Asked Questions. VoLTE Testing
What is VoLTE testing and why does it matter?
VoLTE (Voice over LTE) testing measures the quality, reliability and performance of voice calls carried over 4G LTE networks using IMS. Unlike traditional circuit-switched calls, VoLTE relies on IP-based signaling (SIP) and media transport (RTP), making it sensitive to jitter, packet loss and codec negotiation issues. Testing ensures subscribers receive HD voice quality and helps operators identify call drops, one-way audio and codec fallback problems before they impact customer satisfaction.
How does HiCellTek measure VoLTE MOS scores?
HiCellTek uses a ViSQOL-based machine learning model running directly on the Android device. The model analyzes the decoded audio signal in real time and produces a MOS (Mean Opinion Score) on the standard 1.0 to 5.0 scale. Unlike PESQ or POLQA, which require a reference signal and lab equipment, ViSQOL ML works in the field with no reference audio needed. Scores above 4.0 indicate excellent HD voice quality; scores below 3.0 signal degraded calls that subscribers will notice.
Which codecs does the VoLTE analyzer detect?
The analyzer detects all standard VoLTE codecs: AMR-WB (Adaptive Multi-Rate Wideband) at rates from 6.60 to 23.85 kbps, EVS (Enhanced Voice Services) including super-wideband and fullband modes, and AMR-NB (Narrowband) used as a fallback. The app identifies codec switches mid-call, bandwidth adaptation events and codec mismatch between uplink and downlink, which are common causes of audio quality degradation.
What VoLTE metrics does HiCellTek capture beyond MOS?
Beyond MOS scoring, HiCellTek captures a complete set of VoLTE KPIs: RTP jitter (inter-arrival time variation), RTP packet loss ratio, round-trip delay, SIP call setup time (INVITE to 200 OK), SIP response codes, codec type and bitrate per direction, OVSF channel allocation, handover events during calls, and call drop cause codes. All metrics are timestamped and GPS-tagged for correlation with RF conditions like RSRP, SINR and PCI.
Which Android devices are compatible with the VoLTE testing app?
HiCellTek requires Android 9.0 or above on a Qualcomm Snapdragon device. Root access (DIAG interface) is required for full SIP/RTP-level capture, MOS scoring, and L3 decoding. Android 12 or later is recommended for optimal performance. Root is performed by the customer using Magisk on their own device.
Use these calculations in the field
HiCellTek integrates all these parameters in a single Android app. RF monitoring, L3 decoding and QoE in real time.
- β RSRP, RSRQ, SINR in real time
- β EARFCN & bands auto-detected
- β CSV, QMDL, Excel export