If you had an iPhone 4 terminal then you probably know that Apple had some problems with the algorithm that displays the GSM signal strength in iOS and that in the summer of 2010 the design of the signal bars was changed. For some, the new system is still wrong, so the Bars tweak was launched and it has the role of showing us much more precisely the strength of the GSM signal received by our iPhones. The tweak modifies the signal bars and does not display them completely when the signal passes/falls above a certain value, but only displays fractions of them to give us an idea of how weak/strong the GSM signal is in a certain area.
Get a better understanding of your signal strength – and revert to the stair-stepped indicators of yore! Bars lets you see more about your signal strength, without having to decode what an RSSI is. You still get the familiar five bars, but with an added bonus: if you've got 3.5 bars of signal, the fourth bar will be half full.
Bars works based on the signal calculation algorithm already available in iOS, so it doesn't change it, but it only changes the graphic of the signal bars to show much more precisely how strong the signal is in the area where we are. I haven't tried the tweak, I don't know how good it is, but it only works with iOS 5 and is available for free in Cydia.
