Carrier aggregation requires 4G LTE-A hardware.
If you own the older 3G-only MF65, you have three paths to 4G. The first two options effectively give you "4G for free" when you factor in trade-ins or carrier promotions. zte mf65 upgrade to 4g free
: If your device is locked to a specific carrier, unlocking it might allow you to use a SIM card from a provider with better 3G/HSPA+ coverage in your area. Carrier aggregation requires 4G LTE-A hardware
: Check the ZTE Support site for official stability updates. While this won't give you 4G, it can improve connection reliability. : If your device is locked to a
| Model | 4G LTE Support | Free Upgrade Possible? | |-------|----------------|------------------------| | ZTE MF65 (original) | No (3G only) | No | | ZTE MF65M | Yes (Cat4 LTE) | No (already 4G) | | ZTE MF65+ (Plus) | Yes (Band 28/700MHz) | No (already 4G) | | ZTE MF65D | Yes (Dual-band LTE) | No (already 4G) |
is designed as a 3G HSPA+ mobile hotspot with maximum download speeds of 21.6 Mbps. 4G requires different radio hardware that is not present in this model.
: Some community guides on Scribd suggest using free third-party tools to scan and unlock the modem via USB, though these carry a risk of "bricking" (permanently damaging) the device. MF65M specification sheet - ComX Computers