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School mobile phone blocker

Is there a device that will block mobile phone signals at school?

There is, but you’re not allowed one in the UK! Such a signal jamming device would need to transmit on protected frequencies. And, even if it was legal, given the various mobile phone frequencies and protocols, and the size of most schools, it would’t be a trivial piece of kit.

Such a jamming device would also block mobile phones used by school teachers and the emergency services themselves, and that wouldn’t be good.

Blocking mobile phones is possible by shielding. If you’re lucky enough? to have the bunker classroom under the school, shielded by feet of reinforced concrete you may be fortunate enough to be one of the teaching staff never to experience the buzzing and pinging of mobile phones.

What is really needed is a mobile phone network that simply disables all calls, texts and mobile data during school hours. So if there is no WiFi connection available, mobile phones will be completely disabled.

Parentshield does exactly this.

Every parent has a simple ‘SchoolBlock‘ switch that, when turned on, blocks mobile phones at school between 9am and 3pm. No need to worry about remembering to turn it on and off.

If the pre-set SchoolBlock times are unsuitable, manual blocking time controls are available under the Settings tab.

During the blocking window, the ParentShield phone can still call and text, and call and text the two special “Home Numbers” so should the unexpected happen, the child is always reachable. This is something that no radio jammer could ever achieve. Blocking an entire group of users also means that there are no ‘radio loop holes’. The Four main networks in the UK use different frequencies spread across a huge radio spectrum, so it’s possible that a radio signal jamming device might miss a particular frequency band used by one network, or that one particular frequency is harder to block because of the topography of the school buildings and grounds.

Most ParentShield customers opt to turn SchoolBlock on during term times so it is a proven and trusted way of blocking mobile phones at school with out the need to install any device or hardware.

Make a WiFi sweep part of the School day

To find phones on other networks that don’t provide such signal-blocking features, it’s a simple job to install one of many Wi-Fi signal analysing apps on a teacher’s phone and scanning for unauthorised WiFi hot-spots being provided by phones hidden in bags, lockers or drawers.


UK Mobile Networks Frequency bands

UK Mobile Phone Frequencies

800 MHz BandThree – 791.0 MHz- 796.0MHz Downlink
Three – 832.0 MHz – 837.0 MHz Uplink
EE – 796.0 MHz – 801.0 MHz Downlink
EE – 837.0 MHz – 842.0 MHz Uplink
Vodafone – 801.0 MHz – 811.0 MHz Downlink
Vodafone – 842.0 MHz – 852.0 MHz Uplink
O2 – 811.0 MHz – 821.0 MHz Downlink
O2 – 852.0 MHz- 862.0 MHz Uplink
900 MHz BandVodafone – 925.1 MHz – 930.1 MHz Downlink
Vodafone – 880.1 MHz – 885.1 MHz Uplink
O2 – 930.1 MHz – 935.1 MHz Downlink
O2 – 885.1 MHz- 890.1 MHz Uplink
Vodafone – 935.1 MHz- 939.7 MHz Downlink
Vodafone – 890.1 MHz- 894.7 MHz Uplink
O2 – 939.7 MHz – 947.3 MHz Downlink
O2 – 894.7 MHz- 902.3 MHz Uplink
Vodafone – 947.3 MHz- 955.1 MHz Downlink
Vodafone – 902.3 MHz- 910.1 MHz Uplink
O2 – 955.1 MHz – 959.9 MHz Downlink
O2 – 910.1 MHz- 914.9 MHz Uplink
1400 MHz BandVodafone – 1452.0 MHz- 1452.0 MHz
Three – 1472.0 MHz- 1492.0 MHz
1800 MHz BandO2 – 1805.1 MHz – 1810.9 MHz Downlink
O2 – 1710.1 MHz – 1715.9 MHz Uplink
Vodafone – 1810.9 MHz – 1816.7 MHz Downlink
Vodafone – 1715.9 MHz – 1721.7 MHz Uplink
Three – 1816.7 MHz – 1831.7 MHz Downlink
Three – 1721.7 MHz – 1736.7 MHz Uplink
EE – 1831.7 MHz – 1876.7 MHz Downlink
EE – 1736.7 MHz – 1781.7 MHz Uplink
1900 MHz BandEE – 1899.9 MHz-1909.9 MHz
O2 – 1909.9  MHz- 1914.9 MHz
Three – 1914.9 MHz- 1920.3 MHz
2100 MHz BandThree – 2110.3 MHz – 2124.9 MHz Downlink
Three – 1920.3 MHz – 1934.9 MHz Uplink
O2 – 2124.9 MHz – 2134.9 MHz Downlink
O2 – 1934.9 MHz – 1944.9 MHz Uplink
Vodafone – 2134.9 MHz – 2149.7 MHz Downlink
Vodafone – 1944.9 MHz – 1959.7 MHz Uplink
EE – 2149.7 MHz – 2169.7 MHz Downlink
EE – 1959.7 MHz – 1979.7 MHz Uplink
Ofcom’s Radio Spectrum Allocation to UK Mobile Networks