The 4G Portable USB Modem promises high-speed internet access up to 300Mbps, supporting various network bands and capable of connecting up to 10 devices simultaneously. Its 3200mAh battery and multiple charging options add to its appeal for on-the-go users.

However, user experiences vary widely. Some praise its portability and speed, noting it works very well and is easy to carry around. Others face significant challenges, including poor connectivity, short battery life, and difficulties with APN settings that are not clearly explained in the instructions.

Several users reported that the device does not connect at all or fails to maintain a stable connection, describing it as a 'cheap product' with 'poor performance'. The lack of detailed instructions on how to modify APN settings has been a particular point of frustration, leading some to abandon the device altogether.

In conclusion, while the 4G Portable USB Modem offers promising features for mobile internet access, potential buyers should be aware of the possible need for technical adjustments and the mixed reviews regarding its reliability and ease of use.