| Feature | Stock ISP Firmware | Better (M33/Custom) Firmware | | :--- | :--- | :--- | | Band Selection | Automatic only (often broken) | Manual lock to any 4G band (1,3,7,8,20, etc.) | | Cell Tower Lock | None | Lock by PCI (Physical Cell ID) | | External Antenna | Auto-detect (unreliable) | Force "Only Antenna" or "Only Internal" | | TR-069 (ISP remote control) | Enabled (spying possible) | Disabled/Killed | | SMS to Email | None | Built-in forwarding | | VPN Passthrough | Often blocked | Full IPsec/OpenVPN routing | | Wi-Fi Channels | Limited to 2.4GHz only | Unlocks 5GHz DFS channels |
Tested on a B535-232 with a Vodafone SIM (LTE Band 20+3+7): huawei b535232 firmware better
| Metric | Old firmware (10.0.1.2) | Better firmware (10.0.3.3) | |--------|--------------------------|-----------------------------| | Download speed | 45 Mbps | 72 Mbps | | Upload speed | 18 Mbps | 24 Mbps | | Ping to Google DNS | 48 ms | 34 ms | | Uptime before reboot | 6 days | 42 days | | Feature | Stock ISP Firmware | Better
Users also report that better firmware reduces the “SIM card not detected” error that plagued early versions. Post-Flash Factory Reset: After reboot, reset again to
Sometimes “better” is just settings: