| Feature | NCK Pro | Z3X (Octoplus/Samsung Tool) | SigmaKey | | :--- | :--- | :--- | :--- | | | Poor (relies on old knox counters) | Excellent (direct server patent) | Average | | Qualcomm EDL Auth | Good (uses leaked certs) | Poor (requires paid auth service separately) | Excellent (own auth bypass) | | iOS Bypass | Gimmick (DNS only) | None | Full Checkm8 + Ramdisk | | Price per credit | Moderate ($2-10) | High ($10-30) | Low ($1-5 for old models) | | Support for 2023+ phones | Poor (lacks new loaders) | Moderate | Good (frequent updates) |
| Pros | Cons | |------|------| | ✅ Supports over 8,000 phone models | ❌ Credit system can be expensive for high-volume shops | | ✅ No subscription fee (pay-per-use credits never expire) | ❌ Requires stable internet connection for server operations | | ✅ Regular updates (2-3x per month) | ❌ Steep learning curve for test point procedures | | ✅ Excellent LG and MTK coverage | ❌ Limited Apple (iOS) support (only very old devices) | | ✅ Active community support on major GSM forums | ❌ Some features require rooting the target phone | nck pro dongle gsm forum
