Re: Do these cellular amplifiers work for all cellphones?

On 2022-04-11 04:28, Martin Brown wrote:
> On 10/04/2022 07:42, gtr wrote:
>> On 2022-04-09 06:26:34 +0000, [email protected] said:
>>
>>> On Friday, 8 April 2022 at 20:22:36 UTC+1, gtr wrote:
>>>> Do these cellular amplifiers work when your cellular signal is low? 
>>>> https://www.weboost.com/boosters/vehicle-car
>>>> How low?
>>>
>>> Effectively no for transmit they don't because the base station 
>>> commands the power level of the phone to prevent adjacent and 
>>> co-channel interference.  It sets to a as low a level as practicable,
>>> but still maintain a connection.
>>>
>>> They might provide some assistance on receive, but again the phone 
>>> tells the base station it can reduce power if the signal is too strong.
>>>
>>> In any event a hands portable is limited to 0.6 - 1W (depending on 
>>> generation), whereas a car has its own transceiver and aerial(s) and 
>>> can put out 6W, so if you are sat in a car using hands free you will 
>>> get a better signal than if you were stood outside.
>>>
>>> Obviously MNO's hate them [and they are illegal in the UK] because 
>>> they mess up reception for other users.
>>
>> I didn't understand most of what you said other than you don't think
>> they work but I doubt that is true now that I've spoken to them a bit.
>>
>> I don't doubt that these cell phone amplifiers are illegal in the UK
>> so I will set the follow up accordingly to remove u.t.m in any response.
> 
> I doubt if anyone in the UK would be daft enough to buy one. Most newer 
> vehicles here have a roof antenna and the phone uses bluetooth to bind 
> to the car for handsfree operation using the vehicles external antenna.

Depends on the model options ("trim level").  Lower end optioned cars 
tend to not use the car's antenna.  (ie: my car).

And a roof antenna has nothing to do with the issue of connecting to a 
tower that is further away in a remote area - yes it's better than the 
phone inside, but it's not better than these boosters.


> 
>> I called UberSignal who said they work fantastically for all carriers.
>> https://www.ubersignal.com/vehicle-signal-boosters.html
> 
> Well they would, wouldn't they! What they don't say is that it also 
> messes up phone reception for anyone else in your vicinity (and quite 
> likely radiates sidebands into other protected frequency bands).

This is why the system still has to meet compliance.  US has its 
standard, the UK its own.  Usually manufacturers know and publish what 
countries they are compliant to.


-- 
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  half the cabinet are not asses."
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