The explanation is simple: like all things, sooner or later the SIM card is just
If you need to change your old SIM card,then it can be done very quickly. In fact, any SIM card needs to be changed from time to time, since its life is still limited. Despite the fact that it can serve for several decades, it is important to understand in time when it is worth contacting the salon of a mobile operator.
It is generally recommended to replace the SIM card with a new one.at least once every five years. True, at the same time, if the number was linked to a bank account, then after receiving a new SIM card, you will have to go to the bank, since you will have limited access to finances.
There are several signs that indicate that the SIM needs to be replaced.
These symptoms include frequent loss of networkphone (if the problem is in the SIM card, then even when installed in another device, the connection will be lost), the Internet disappears, the conversation is interrupted, as well as switching to 2G and 3G if there is a good 4G signal.
If, with all this, you bought a SIM card for a long time, then it is best to replace it with a new one.