Cat 4 — which means up to ~150 Mbps download, ~50 Mbps upload under good conditions.
LTE Bands Supported
Varies, but many support multiple FDD‑LTE bands such as B1, B3, B5, B7, B8, B20, B40 etc. Some also support TDD‑LTE bands like B38, B41 depending on region. Important to check if the device supports the bands used by your carrier.
WiFi Standard
Often 802.11 b/g/n on 2.4 GHz; some support only 2.4 GHz (no 5GHz). Speeds advertised around 150 Mbps (which may be theoretical WiFi capacity, not what you get in actual use).
Number of Users / Connections
Usually can support ~8‑10 clients connected simultaneously.
Battery
Some models are battery‑powered (“MiFi” style), with battery capacities around 2000‑2500 mAh, giving a few hours of continuous use; standby time is longer. Others might be plug‑in versions.
Interfaces
SIM card slot, usually a micro or nano SIM; USB charging / power; sometimes microSD for storage; possibly LEDs or small screen to show signal, battery, WiFi status.
Form Factor & Portability
Small, lightweight, pocketable for travel; some models about 80‑100 g; dimensions typically a few inches.
What It Does Well
These routers are good for:
Travel / remote use: Where wired internet isn’t available, you can get 4G coverage and share it.
Backup internet: Having redundancy for home or small office, in case main ISP goes down.
Multiple devices: Rather than using your phone as hotspot, these free up your phone battery.
Flexibility: Move around; possibly use external antennas (if supported); swap SIMs; possibly international use (if bands supported).
Affordability: Devices around this spec tend to be cheaper than high‑end LTE routers.
