Why can't iphone receive verification code SMS?

Settings-Info-Filter Unknown Senders. Just set it to on.

Disadvantages of iphone:

1. Small space storage

2. Poor endurance

3.？ You can only upgrade from low allocation to high allocation, not from high allocation to low allocation.

4.？ Now the fast charging on domestic mobile phones can be said to have been popularized, but this year's latest iphone7 still has no fast charging function. Let's just say that the response of Apple's mobile phone is really much slower.

5. There is no innovation in appearance. Speaking of the first generation of iphone, the first generation looks similar to the third generation. From iphone4 to iphone5s, the appearance has not changed. From iphone6 to iphone7plus, the appearance has not changed much.

6. Dual card dual standby is not supported

7. You can't save dynamic GIF pictures.

8. This mandatory update will pop up every day and cannot be cancelled.

9. battery problems

According to official data, the longest time for iphone to play music is 16 hours, the longest time for playing video is 5 hours, the longest time for talking on mobile phone is 8 hours, and the longest time for standby is 250 hours. Because the battery of iphone is built-in, users can't change it at will. After 300 ~ 400 charging cycles, the maximum capacity of the battery will drop to 80%.