SBGJ918 Mini Dual Band Booster 2G & All LTE 4G/5G
Mini Dual Band Booster instantly improves weak signal areas into strong, reliable coverage—delivering crystal-clear calls and faster 4G LTE / 5G data across your home or office.
Built to work with South African and any other African networks on 900/1800MHz, it delivers strong voice, SMS, and high-speed data coverage over areas up to 250m².
And there’s zero risk. You’re backed by a 3-year manufacturer replacement warranty and a 30-day money-back guarantee. Plug it in, feel the difference, and if it doesn’t blow your expectations away, we’ll make it right—no hassles, no stress.
The Mini Dual Band Booster is designed for anyone who’s tired of dropped calls, weak signal, or slow mobile data. Setup couldn’t be easier—every unit comes with a clear, step-by-step instruction manual that guides you through the installation process, so you can have it up and running in minutes. No technical expertise or complicated wiring required—just plug it in and start experiencing the difference.
Once powered on, this booster delivers strong, reliable coverage across up to 250m², making it ideal for homes, offices, or small commercial spaces. It supports up to 30 simultaneous users, so multiple devices can enjoy clear voice calls, SMS, and high-speed 4G LTE / 5G data without interruptions.
We’ve designed the SBGJ Mini 918 Dual Band to be true plug-and-play performance. The included outdoor antenna captures signals from outside, then the indoor antenna distributes stronger coverage where the unit is mounted, and the 10-meter coaxial cable makes placement flexible, so your booster works exactly where you need it most.
Why choose our Mini Dual Band Booster?
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Works with all South African & African networks operating on 900/1800MHz for voice, SMS, and 4G LTE / 5G.
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Advanced digital design ensures a high gain of 60/65dB, delivering stable, amplified signal with minimal interference.
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Oscillation alarm prevents signal overload and ensures safe, efficient operation.
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Backed by a 3-year manufacturer replacement warranty and a 30-day money-back guarantee—so you can try it completely risk-free & ICASA Approved.
No guesswork, no headaches, just instant, reliable mobile signal exactly where you need it. Whether it’s for working from home, streaming, gaming, or staying connected with family, this booster transforms weak signal areas into full-strength, high-speed coverage effortlessly.
Setting Up Your SBGJ Mini 918 Dual Booster
All our boosters are designed around basic and quick installation procedures (Plug & play).
AN OUTDOOR ANTENNA: This accessory is one of the most required kits for booster installation. It is mounted outside the building mostly the roof or highest point in the building and the key purpose is to pull signals from outside via the coaxial cable to the Booster, this accessory is included free of charge in the box.
10 METRES COAXIAL CABLE: The outdoor antenna on the roof is attached to the coaxial cable on one end and the second end is connected to the mobile booster to be mounted inside the home. The cable serves to transmit signals into the repeater from the external antenna.
MINI DUAL BAND BOOSTER: The mobile phone booster is an integral aspect of the puzzle, as soon as the signal is transferred from the roof antenna through the coaxial cord, it helps to amplify the mobile phone signal in the building through the indoor antenna.
INDOOR ANTENNA: This is the distribution antenna that the mobile booster uses to transmit this signal internally using these high-power indoor antennas.
AC/DC POWER SUPPLY: The AC/DC power supply and power plug supplies the repeater with all the currents it need to function.
What’s Included In The Box
- Mini Dual Band Booster
- Outdoor antenna
- 10 meter coax cable
- AC/DC Power Supply
- Indoor Whip antenna
- Easy to work with Installation Manual
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Specifications
| SKU |
SBGJ 918 |
| Gain |
UL 29~60dBDL 34~65dB |
| Power |
UL Max 20dBm
DL Max 19dBm |
| Coverage |
250 m2 |
| Frequency |
GSM900: UL 890~915MHz DL 935~960MHz
GSM1800: UL 1920~1990MHz DL 2110~2180MHz |
| Ripple in Band |
≦ 5dB |
| Spurious Emission |
≦ -30dBm ~ -36dBm |
| Max Noise Figure |
≦ 6dB |
| Return Loss |
≦ 3dB |
| Time Delay |
≦ 0.5μs |
| MTBF |
> 50000hours |
| Power Supply |
AC100~240V 50~60Hz / DC12V 2A (Included) |
| Power Consumption |
< 10 Watt |
| Impendence |
50 Ω |
| Connector |
N-Female as standard |
| Cooling |
Heatsink convection cooling |
| Dimensions (DxWxH) |
230x130x34mm |
| Weight |
1200 Gram |
| Environment Conditions |
IP 40 |
| Humidity |
< 90% |
| Operating Temperature |
10°C – 60°C |
David Green – Randburg –
We installed this in our boardroom because our fibre kept failing. It boosted all our staff’s mobile signals instantly. We now use mobile data without stress.
Precious Mabuza – Tzaneen –
Affordable, effective, and simple to use. This product is perfect if you want to boost signal in one room. It really does deliver what it promises.
Mandla Ngwenya – Nelspruit –
This booster brought me peace of mind. No more walking around the house looking for signal. I can relax in my room and still get full mobile access.
Emma Jacobs – Hout Bay –
My daughter uses it for online classes. Her Zoom calls don’t lag anymore. It’s just installed in her room and the results are excellent.
Sipho Dlamini – Mbabane, Eswatini –
Signal used to drop constantly in my room. Now I have uninterrupted calls and better LTE coverage. I didn’t expect it to work this well.
Naledi Radebe –
It’s amazing what this little device can do. Calls are smooth, data is fast, and SMS goes through without a delay. Exactly what I needed for my study room.
Joseph Moyo – Maputo, Mozambique –
For small apartments or single rooms, this product works wonders. I now make long-distance calls with no problem. 4G and sometimes even 5G data too!
Liesel Groenewald – Paarl –
I paid via EFT, received the booster quickly, and within 20 minutes after installation I had full bars for voice and 4G. I live in a brick house, so I installed it near a window on top of my chimney and it works perfectly for my room.
Musa Mthethwa – Richards Bay –
I used to step outside just to send an SMS. With this installed in my home office, I now get stable signal for everything. Fast and reliable.
Susan Matlala –
Great little booster. I get 4G and can even stream Netflix in my room now. Before, I had no bars. It’s small but powerful.
Farai Mutasa – Harare, Zimbabwe –
I run a small online shop from my room. Signal was terrible. This booster helped me stay connected and close sales. Clear calls and faster LTE. I’m saving and making more money now.
Chantelle Botha – Port Elizabeth –
We couldn’t use our phones in the baby’s room. Now the 4G signal is strong and stable. Simple device, big impact. Highly recommended.
Teboho Mokoena –
I use it in my bedroom because I do everything from there—work, study, calls. The improvement is real. LTE speeds are now stable. Setup was easy too.
Janine Steyn –
I was losing business because clients couldn’t reach me. This signal booster fixed that immediately. Voice calls, SMS, and WhatsApp all work smoothly now. Perfect for a one-room office.
Bongani Molefe –
For anyone living in a signal dead spot, this device is a miracle. I can finally make voice calls and browse using LTE. Bought it via EFT and it arrived quickly. I should’ve done this sooner.
Karen Pillay –
I installed it in my lounge and instantly got full 4G bars. Calls used to drop all the time—now I talk for hours with zero issues. It even picks up 5G sometimes! Great value for the price.
Themba Nkosi –
This booster brought life back to my home office. I now make crystal-clear calls and run my side hustle on LTE with no interruptions. Perfect for my small flat. Don’t overthink it—just buy it.
Lauren Daniels –
I couldn’t even make a proper call in my bedroom. Now with this signal booster, I get full bars on Vodacom and fast 4G data. The rest of the family can even get up to 5G on there mobile phones now. I work online, and this changed everything. Ordered online, paid with my credit card. Delivered in two days. Simple and effective.