The FOSA 4G LTE USB Portable Router promises a lot: high-speed internet, support for up to 10 devices, and secure WPA/WPA2 encryption. However, user experiences reveal a mix of satisfaction and frustration.

On the positive side, the router is praised for its portability and ease of use. It's USB-powered, meaning you can use it with a variety of devices like power banks or car chargers. Users also appreciate its ability to support multiple devices simultaneously, making it a good option for small groups or families on the go.

However, several users reported issues with setup and functionality. A common complaint is the lack of clear instructions. Some users found the manual too small to read without magnification and lacking crucial information like the default password. Others struggled with SIM card compatibility, finding that their mobile carriers couldn't activate the hotspot feature.

Another point of contention is the device's performance with different networks. While some users successfully connected to their cellular networks, others faced challenges due to band mismatches or network switching issues, particularly with Verizon.

In conclusion, while the FOSA 4G LTE USB Portable Router offers promising features for travelers and tech enthusiasts, potential buyers should be prepared for possible setup challenges and ensure compatibility with their network providers before purchasing.