If you have a budget of around 4000, then choosing the right phone does need to be carefully considered. In today's mobile phone market, this price point allows you to choose some mid-to-high-end phones, but there are also some details to pay attention to.
First, you need to be clear about your needs. Do you focus on photography, gaming performance, or everyday use?Once you have identified your needs, you can target your search for products that meet these criteria. I suggest you consider these phones, as they all offer good value for money. 
The Xiaomi Mi 14 is a lightweight and versatile smartphone that weighs only 193g, making it easier for you to carry and use. The Snapdragon 8 Gen3 processor ensures excellent performance and responsiveness, making it easy to cope with both work and play.
In terms of battery life, the Xiaomi Mi 14 has a large 4610mAh battery and supports 90W wired fast charging and 50W wireless fast charging, allowing you to fully charge in a short time and no longer worry about power issues.
In terms of memory combination, Xiaomi Mi 14 provides a configuration of 12+256G to meet your storage needs, and at the same time**It is also very close to the people, only 4299RMB.
The camera function is also a highlight of the Xiaomi Mi 14, with a front 32 million pixels, a rear 50 million pixel main camera, with a 50 million pixel wide-angle lens and a 50 million pixel telephoto lens, whether you shoot landscapes or portraits, you can get a clear and delicate picture.
In addition, Xiaomi 14 also has screen fingerprint, 120Hz high refresh rate, dual speakers, linear motor, infrared, NFC, IP68 dustproof and waterproof and other functions, and also supports DC-like dimming, effectively reducing the damage of screen flickering to the eyes.
The iQOO 12 is a smartphone with powerful performance and a great experience. It weighs only 2037 grams, very lightweight and easy to carry. It is equipped with a Snapdragon 8 Gen3 processor, which guarantees smooth performance and efficient running speed. In addition, the iQOO 12 also has a large 5000mAh battery and supports 120W super fast charging, which can be fully charged in about 25 minutes, allowing you to say goodbye to power anxiety.
In terms of memory, the iQOO 12 offers a combination of up to 16+1T, which is very cost-effective. In terms of photography, it has a front 16-megapixel and a rear 50-megapixel main camera, and also supports up to 100x digital zoom, which can meet the needs of both daily shooting and professional photography. In addition, it comes with a large size of 6The 78-inch screen supports a high 144Hz refresh rate, making the gaming and viewing experience even better.
It is worth mentioning that iQOO 12 also uses the latest on-screen fingerprint technology, which not only makes the phone look more beautiful, but also improves the accuracy and speed of unlocking. The addition of symmetrical dual speakers and linear motors also improves the sound quality and vibration. In addition, it supports NFC and IR remote control functions and has IP64 waterproof rating. Overall, the iQOO 12 is a powerful and full-featured smartphone.
The vivo X100 is a smartphone with excellent performance and advanced technology, and its body weight is only 206g, which is light and sophisticated. Equipped with the latest Dimensity 9300 processor, it can provide powerful computing power and efficient running speed, allowing users to get a smooth and stable experience in daily use and gaming scenarios.
One of the highlights of the phone is its excellent battery life. Equipped with a 5000mAh large-capacity battery and supporting 120W super fast charging technology, it only takes about 33 minutes to charge the phone from 0% to 100%, so that users no longer have to worry about power anxiety.
The vivo X100's memory combination is also very powerful, equipped with 12+256G of storage, which guarantees the smoothness of the phone when multitasking and large applications run. At the same time, its camera function is also very powerful, the front camera reaches 32 million pixels, and the rear camera has a 50 million pixel main camera, 50 million pixel wide angle and 64 million pixel telephoto triple camera combination. The main camera uses an IMX920 sensor and has a 1 1The outsole of 49 and OIS optical image stabilization, the wide-angle lens uses the JN1 sensor, and the telephoto lens uses the OV64B sensor, which supports up to 100x digital zoom, which can meet the shooting needs of users in different scenes.
In addition, the vivo X100 also has advanced features such as on-screen fingerprint recognition technology, a 120Hz high refresh rate screen, dual speakers, linear motors, IR and NFC, which can provide an all-round smart life experience. Its IP68 rating for water and dust resistance also guarantees the durability of the phone.