Manufacturers of IoT devices often focus their efforts on hardware development and software optimization, while the procurement of IoT cards is frequently treated as a “minor detail”. The result? After the devices are sold, customers complain about poor signal quality, excessive data usage, chaotic management, and even service suspension by operators due to compliance issues. These problems could have been avoided, but too many people regret not asking a few more questions beforehand.
- Assuming the card will work just by inserting it, only to find out the network standard is incompatible
Some device manufacturers think that IoT cards are similar to mobile phone cards, and that they can simply buy one and plug it in to connect to the network. However, reality is not that simple. Your device supports Cat.1, but the card provided by the supplier is an NB-IoT card; or the device requires 4G full network access, but the purchased card only supports a single operator. It is only when deployed on-site that they discover the signal is intermittent or completely unable to connect. What’s more troublesome is that the network coverage varies greatly in different regions. In the city center, the 4G signal may be full, but in industrial areas or remote locations, it might only support 2G. Before procurement, it is best to test the network conditions in the target area on-site, rather than waiting until mass deployment to find out that the signal cannot support business needs. - Focusing only on low monthly fees without calculating long-term costs
Low-cost plans are certainly attractive, but many hidden costs will emerge later. For example, some cards have a promotional price for the first three months, after which the fees double; or if data usage exceeds the limit, charges are applied at a high rate, and if the device malfunctions and consumes data abnormally, the bill can be shocking. Another situation is the “data pool” model, which seems flexible, but if one card suddenly uses a lot of data, it can deplete the entire pool, causing other devices to lose connectivity. Device manufacturers can easily be misled by the superficial low price if they do not carefully calculate actual usage, ultimately paying a higher price. - Not clarifying operator policies, leading to sudden card suspension
IoT cards do not stay online forever just by being powered on. Some operators stipulate that if a card has no data usage for several consecutive months, it will be forcibly suspended or even deactivated. If your device operates intermittently (for example, agricultural sensors that only activate during the rainy season), the card may be canceled before data transmission even occurs. Additionally, using the card across regions may also trigger issues. Some IoT cards specify “intra-provincial use only”; if the device goes out of province, it will lose connectivity. If a customer sells the device to another region, the complaint calls will quickly come to you. - Management backend is difficult to use, hindering operational efficiency
Managing a few dozen cards manually is feasible, but what about thousands? Many device manufacturers do not pay attention to whether the management platform is user-friendly during procurement, resulting in each card needing to be recharged individually, checking data usage, and troubleshooting being like searching for a needle in a haystack. Worse still, some platforms do not even support batch operations, leaving operational staff bogged down with trivial tasks every day. Additionally, some suppliers do not provide API access, making it impossible to integrate device data and data usage monitoring into their own systems. When customers ask, “Why is the device offline?”, you have to piece together information for a long time, which naturally degrades the experience. - Ignoring compliance risks, creating legal pitfalls
IoT cards cannot be used arbitrarily. Some industries (such as automotive and finance) have strict data security requirements and must use dedicated APNs or real-name authentication. If the purchased card does not meet the standards, it may be throttled by the operator, or worse, face legal risks. A more hidden issue is the “device-card binding” problem. Some operators require IoT cards to be fixed to specific devices; once a device change is detected, the card is immediately suspended. If your customer wants to change terminals on their own, they may suddenly lose connectivity, and you will have to clean up the mess.
Do not let IoT cards become a weak link in your project. For device manufacturers, IoT cards are not just simple “accessories”; they are a key factor affecting product stability, customer experience, and even compliance. Asking a few more questions during procurement and testing multiple scenarios is much easier than firefighting later. After all, no one wants to ruin the hard-earned trust of customers because of a card issue.
