Zong 4G K12 WiFi 6 Router (Bolt Ultra)
Zong's WiFi 6 business router: ZTE hardware with automatic failover to a backup SIM.
The K12 is marketed by Zong as the Bolt Ultra, but the hardware underneath is a ZTE K12, the same pattern as other carrier-rebranded routers in this catalog. What sets it apart here is automatic failover: if you already have a wired internet connection, the K12 can sit alongside it and switch to its 4G SIM the moment the wired line drops, then switch back once it's restored. It also supports WiFi 6 (though on a single 2.4GHz band, not the dual-band experience of higher-end WiFi 6 routers) and includes a small removable battery for short power interruptions.
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Zong 4G K12 WiFi 6 Router (Bolt Ultra)
PKR 11,000
Automatic backup for an existing wired connection
This router is built around a specific setup: you already have a wired broadband connection, fiber, DSL, or a wired ISP line, and want automatic backup if it drops. Insert a SIM, connect the wired line to the router's WAN/LAN port, and it switches to 4G automatically the moment the wired connection fails, then switches back once it's restored. It works fine as a stand-alone 4G router too, but the failover is the feature that sets it apart from the other 4G routers in this catalog. WiFi 6 support and a small removable battery round it out, but neither is the main reason to choose this one.
Best For
- Small offices or shops with an existing wired connection that want automatic 4G backup if it drops
- Anyone wanting WiFi 6 client devices to connect at the newer standard, even on a single 2.4GHz band
- A short power-cut buffer via the removable 2550mAh battery
- Zong customers who want their SIM ready to go, though the slot is factory unlocked for any network
Not Ideal For
- Buyers expecting dual-band 5GHz WiFi, since WiFi 6 here is single-band 2.4GHz only
- Long power outages, since the 2550mAh battery covers a short gap, not hours; the Jazz C061-100 has a larger 4000mAh battery if that matters more to you
- Households wanting 5G, since this is a 4G LTE Cat4 router
- A pure SIM-only setup with no wired line to fail over from, since a simpler 4G router without this feature is usually the cheaper choice
Specifications
- 4G LTE Cat4, up to 150 Mbps download / 50 Mbps upload
- WiFi 6 (802.11ax), single-band 2.4GHz, up to 574 Mbps wireless
- Connects up to 32 WiFi devices simultaneously
- Automatic failover between the 4G SIM and a wired WAN/LAN connection
- 1x 100Mbps Ethernet port (WAN/LAN)
- 1x RJ11 port for voice calling
- 2550mAh removable battery for short power interruptions
- Factory unlocked, works with any Pakistani SIM despite the Zong branding
- PTA approved, printed directly on the retail box
- Managed via Web UI or the ZTE SmartLife app
- Network
- 4G LTE Cat4
- Max Speed
- Up to 150 Mbps down / 50 Mbps up*
- WiFi Standard
- WiFi 6 (802.11ax), single-band 2.4GHz, up to 574 Mbps*
- Max Connected Devices
- 32
- Failover
- Automatic switching between 4G SIM and wired WAN/LAN connection
- Ethernet
- 1x 100Mbps WAN/LAN port
- Phone Port
- 1x RJ11 (voice calling)
- Battery
- 2550mAh, removable
- SIM Slot
- 1x Nano SIM (4FF)
- Management
- Web UI or ZTE SmartLife app (iOS/Android)
- Firmware Updates
- FOTA (over-the-air)
Speed and WiFi figures marked * are manufacturer-rated maximums under ideal conditions, not an independent test result. The failover feature requires an active wired internet connection plugged into the router to fail over from. On its own with only a SIM inserted, it behaves like a standard 4G router.
Network Compatibility
Despite the Zong Business Solutions branding on the box, this is factory-unlocked ZTE K12 hardware and works with Jazz, Ufone, and Telenor SIMs as well. PTA approved, marked directly on the retail packaging.
Setup Guide
- 1
Insert your Nano SIM card into the slot on the back of the router.
- 2
If you have an existing wired internet connection, plug it into the router's WAN/LAN port to enable automatic failover.
- 3
Connect the removable battery and power adapter, then switch the router on.
- 4
Connect to the WiFi name and password printed on the back label, or open the ZTE SmartLife app or web dashboard to manage it.
- 5
If the wired connection ever drops, the router switches to the SIM connection automatically, no action needed on your part.
Questions About This 4G Router
No. The hardware is a ZTE K12, which Zong sells and markets under its Business Solutions line as the 'Bolt Ultra.' It is factory unlocked, so the Zong branding on the box doesn't limit which SIM you can use.
