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| Model | YQ601/YQ603/YQ605/YQ607 |
| Release date | August 25, 2015 |
| Successor | Smartisan U3 (indirect) |
| Operating system | Android 4.4.2 (Smartisan OS 2.0 - 4.2.6) |
| SoC | Snapdragon 615 [MSM8939] |
| RAM | 2GB |
| ROM | 32GB |
| SIM | Dual physical nanoSIM, no eSIM support |
| microSD | Dedicated slot |
| Display | 5.5", 1920x1080, 60Hz, Gorilla Glass 3 |
| Rear camera | 13 Mpix |
| Front camera | 5 Mpix |
| Cellular | 4G/3G/2G |
| Bluetooth | 4.0 |
| WiFi | 802.11 b/g/n |
| Battery | 2900 mAh |
| Fingerprint sensor | No |
| Materials | Plastic, Glass |
| I/O | microUSB, headphone jack |
| Website | smartisan.com/jianguo |
Smartisan U1 (also known as Smartisan Nut, Smartisan JianGuo); (Chinese: 锤子坚果; Pinyin: chuízǐ jiānguǒ) - a smartphone released in 2015 by Smartisan Technology Co., Ltd.