The Lumia’s screen went black. Then white. Then a single line of text appeared, written in the phone’s original Nokia font:
| Model Number | Regions / Carriers | Codename | | :--- | :--- | :--- | | | Global, Dual SIM (Single SIM in some regions) | Saana | | RM-1154 | USA (T-Mobile / MetroPCS), Single SIM | Saana | | RM-1156 | China, Dual SIM (China Mobile / Unicom) | Saana | i lumia 650 emergency files best
You need emergency files when: