You can use a Qualcomm-based phone or USB modem as a cellular diagnostic capture source if it exposes a Qualcomm DIAG interface that your computer can access. QCSuper can capture supported radio signaling for live analysis in Wireshark or save it as a PCAP file. A Qualcomm chipset alone does not guarantee compatibility, and “sniffer” here means inspecting diagnostic data from the connected device—not secretly capturing nearby phones’ traffic.
What the capture includes—and what it does not
QCSuper communicates with Qualcomm DIAG, also called QCDM or DM, through a diagnostic interface exposed by the phone or modem. The project describes capturing raw 2G, 3G and 4G radio frames, with 5G support limited to certain models. Its documented protocol layers include GSM, GPRS/EDGE, UMTS and LTE; do not assume every device or 5G network is supported. QCSuper’s project documentation describes the tool and its supported workflows.
By default, QCSuper captures signaling exposed through the device’s diagnostic interface, not the device’s ordinary generated IP traffic. The project also documents an option to include IP traffic. Those are different kinds of data: choose the capture mode based on whether you need radio signaling, IP packets, or both. This is not a way to intercept arbitrary over-the-air traffic from other people’s phones.
Check compatibility before connecting
Identify the exact phone or modem model and confirm its chipset, then check whether that model can expose a Qualcomm DIAG port. Device support and the procedure for enabling diagnostic access vary by handset, modem, firmware and manufacturer. A Qualcomm processor is only a clue; it is not proof that QCSuper will work. The project advises checking compatibility at the model level. Consult its current compatibility and setup documentation before changing device settings.
Recommended Free Tools
#1 Best Overall
- Wide Carrier Compatibility: Works with major 4G providers including AT&T and T-Mobile with download speeds up to 150Mbps. Simply insert a SIM card and get all your Wi-Fi devices connected to the internet, convenient for places where cable internet is unavailable, such as holiday cabins or remote cameras. Fully supports 4G LTE Frequency Band: B2/B3/B4/B5/B7/B8/B12/B13/B17/B25/B26/B66/B41 WCDMA: B2/B4/B5/B8 (Verizon requires TTL set to 64 or 65 based on different data plan)
- High-Speed Connectivity: 4G LTE Cat4 with cellular download up to 150Mbps and N300 dual-band wireless speeds reaching 300Mbps for smooth streaming, lag-free online gaming, and quick file sharing
- Enhanced Signal Coverage: High-gain four antennas expand signal reach throughout houses, providing reliable internet connection for 32 smart home devices via wired LAN links with 4 fast Ethernet ports
- Advanced Security Features: Embedded L2TP, PPTP, OpenVPN, and WPA3 encryption safeguard data privacy, while Mesh capability allows seamless roaming network expansion across rooms
- Simple Setup Process: Built-in standard SIM card slot with plug-and-play functionality allows immediate cellular internet access without configuration, featuring user-friendly web interface for effortless management
- Android phone: QCSuper documents an ADB route to the device’s
/dev/diaginterface for rooted phones. Root access may be required for this path. - USB diagnostic port: Some phones expose DIAG over USB after the appropriate device-specific diagnostic mode is enabled.
- USB modem: A modem may present a diagnostic pseudo-serial port over USB. Some models require a vendor-specific command to expose it, so there is no universal command that is safe to recommend for every modem. QCSuper’s protocol documentation describes these connection approaches.
Rooting a phone or enabling a hidden diagnostic port can affect security, stability or warranty status. Do not follow an unlocking recipe intended for a different model or firmware. A USB data cable can connect compatible hardware to a computer, but it cannot create a DIAG interface the device does not expose.
Capture with QCSuper
Once you have confirmed that the computer can reach the device’s DIAG interface, QCSuper offers two documented analysis paths: stream a live capture to Wireshark or write a capture to PCAP for later inspection. Follow the project’s current installation and command instructions, since the correct connection method depends on whether your device uses ADB, a USB DIAG port or a modem’s diagnostic serial interface. The project documentation is the source for current setup details.
Rank #2
- FAST 4G LTE CONNECTIVITY: Allowed for downloads at speeds up to 150Mbps and uploads 50Mbps for uninterrupted HD streaming, gaming, video calls and more. Please check with preferred carrier on data plan details and limitations. This 4G router works with AT&T and T-Mobile only. (NOT for Verizon or Sprint and SIM Card not included)
- DUAL BAND SIGNAL TECHNOLOGY: With both 2.4GHz and 5GHz Wi-Fi bands, AC1200 Router will give you a more stable network. 2.4GHz band can meet the basic network tasks, such as web browsing, reading emails, chatting online and more. It will switch to 5GHz frequency band to get a refreshing and practical experience when playing online games or watching HD videos
- 1200MBPS WIFI SIGNAL SPEED: Convert 4G LTE signal to Wi-Fi providing 900Mbps 5.0GHz and 2.4GHZ 300Mbps speed. It can support 32 devices at the same time, keep all of wireless devices connected
- UNINTERRUPTED NETWORK CONNECTION: 1x RJ45 WAN port to connect to modem; 4x RJ45 Ethernet ports to connect wired device or network switch. Automatically switch to the 4G network when the broadband network is disconnected
- USER-FRIENDLY 4G ROUTER SETUP: Extremely easy to set up for beginners. All you have to do is simply insert your standard 4G SIM card, followed by keying-in the password. No hassle. No extra equipment needed
- Confirm the model and interface. Verify that the exact device is supported and determine how its diagnostic interface is exposed.
- Connect using the device-specific method. For a rooted Android phone, use the documented ADB path; otherwise, use a DIAG port or modem interface that the manufacturer or project documents for that model.
- Choose the data you need. Use the default signaling capture for radio diagnostics. Enable IP traffic capture only if that is needed and supported by your setup.
- Choose live or saved analysis. Send supported output to Wireshark for live inspection or save it as PCAP for a later review.
Diagnostic captures can contain sensitive information about device activity. Capture only equipment and data you are authorized to inspect, and handle saved PCAP files accordingly.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.QCSuper or QXDM Professional?
QCSuper is an open-source option for compatible devices when PCAP output or live Wireshark analysis suits the task. QXDM Professional is Qualcomm’s vendor diagnostic software for capturing and monitoring proprietary logs, messages and events. Qualcomm describes QXDM as subscription-licensed software and says its use requires a Qualcomm USB driver. Check with Qualcomm for current pricing, availability and licensing terms. Qualcomm’s QXDM Professional page provides the vendor’s product information.
Free tools Windows power users keep installed
One-click scans. No signup required.
Quick Recap
Rank #4
- [Easy Plug and Play Setup] : Just plug in using the convenient usb power source, insert your sim card, and enjoy seamless 4g network access anytime, anywhere.
- [High Speed Connection] : Experience up to 300mbps speeds, making it for all your devices including phones, tablets, laptops, computers, and tvs.
- [Support 4g and 3g] : Enjoy fast fdd lte b1 b3 b5 b8 and tdd lte b38 39 40 41, as well as wcdma b1 b8 connectivity for reliable internet access.
- [Multi-device Connectivity] : Connect up to 10 devices simultaneously with this mobile hotspot, ensuring everyone stays connected on the .
- [Enhanced Security Features] : Stay protected with wpa, wpa2 encryption and advanced security, preventing network intrusions and ensuring data control.
Rank #3
- Plug and play: 4G mobile is plug and play, enjoy 4G internet, convenient USB power supply method, connect power device, insert SIM card, use SIM card data to surf the Internet anytime, anywhere.
- Multiple : router adopts multiple design, more secure, WPA/WPA2 encryption, effectively avoid internet squatting, support data control.
- Support Multiple Users: USB portable supports multiple terminals to access the Internet at the same time, and supports 10 devices, such as mobile phones,laptops, computers, smart TVs and other devices.
- USB Powered: Portable supports multiple 4G networks, sharing up to 10 users, powered by devices with USB ports, such as mobile phone chargers, car chargers, power banks, etc.
- High Speed Stable: 4G USB portable provides fast and stable high speed Internet access, high speed 4G internet, stable , feel the wonderful internet life, and fast Internet access.
| Option | Best suited to | Connection and access | Cost and trade-off |
|---|---|---|---|
| QCSuper | PCAP generation and live Wireshark analysis on compatible devices | ADB/root access or an exposed USB DIAG port, depending on the device | Open-source; compatibility and setup vary by model. Check the project’s current documentation. |
| QXDM Professional | Professional diagnostic logging, proprietary messages and events, and development workflows | Diagnostic connection with device services enabled; Qualcomm USB driver required | Qualcomm describes annual subscription licensing. Current quote, availability and terms should be confirmed with Qualcomm. |
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
