For senior players, Apple's locked machine should be more or less understood. This type of machine is often called a card sticker machine, that is, when it is used, it needs a card sticker. They are actually the contract mobile phones of foreign operators, and they are locked by the operator without completing the contract. In China, the biggest advantage of having a locked machine is that the price is cheap, and it only takes about 70% of the price of the national bank to win.
Among them, when the lock mobile phone is used, it is divided into ICCID unlock and TMSI unlock. where ICCID Unlock is by using a sticker, entering a unique ICCID, and then bypassing network restrictions. ICCID unlock is relatively stable, as long as you do not change the card at will, do not randomly swipe or restore the mobile phone system, you can always use it as a lockless machine. The ICCID unlock method, which was discovered in 2017, is called Perfect Unlock, and was blocked twice in the middle, in October 2017 and September 2019.
TMSI unlocking is not so perfect, this unlocking method is equivalent to the user obtaining a temporary passport, which can be disguised as an operator contract mobile phone card, thus relaxing the restrictions on the network. Since it comes to the temporary, it means that TMSI unlocking will be very unstable, daily use into the signal is not good, if you use TMSI to unlock, you may jump activation, this time can only choose to re-unlock.
Recently, Apple's ICCID unlock method has been blocked again, and the locking machine can only use unstable TMSI to unlock. In this way, the price of the locked machine is bound to usher in a substantial price reduction compared with before. Referring to the price before the ICCID unlock was launched in 2017, the lock machine may drop to 60% of the price of the official website, that is to say, about 3,000 yuan, we may be able to buy a 128GB version of the iPhone 13 mini.
Although the current price of the locked machine is only 60% of the official website, it is still not recommended for individuals to buy a locked machine. First of all, the origin of this type of model is very complicated, if you do not know very well about locking machines, it is very easy to buy a refurbished machine, or even a mobile phone that has been replaced with parts. Buy such a model, the quality is difficult to guarantee, if it is broken in a few days, then the loss will be very huge.
In addition, the TMSI unlock is very unstable, the operation is also more difficult, ordinary users are likely to buy back it is likely not to play. Even if you can barely use it, it will affect many things because of the unstable nature of TSMI. And the price of second-hand recycling with the lock machine is very low, and the price received will definitely exceed your psychological expectations. If you don't sell it satisfactorily after buying it, you need to lose a lot of money, and if you calculate it, it is better to buy a new national bank machine in one step. If the budget is really insufficient, it is recommended to consider low-priced products such as the iPhone SE3.