What is A-GPS?
GPS operation uses radio signals from satellites alone.
A-GPS additionally uses network resources to locate and use the satellites in poor signal conditions.
In very poor signal conditions, for example in a city, these signals may suffer multipath propagation where signals bounce off buildings, or be weakened by passing through atmospheric conditions, walls or tree cover. When first turned on in these conditions, some standalone GPS navigation devices may not be able to work out a position due to the fragmentary signal, rendering them unable to function until a clear signal can be received continuously for up to 12.5 minutes (the time needed to download the GPS almanac and ephemeris).
An Assisted GPS system can address these problems by using data available from a network.
Assistance falls into two categories:
1. Information used to more quickly acquire satellites
2. Calculation of position by the server using information from the GPS receiver
As an additional benefit, in some A-GPS device implementations, the amount of CPU and programming required for a GPS receiver is reduced by offloading most of the work onto the assistance server.
GPS, is slower on time to first fix. That is why many mobile phones combine A-GPS and other location services including Wi-Fi Positioning System and cell-site triangulation and sometimes a hybrid positioning system.
0.58 is not available on my country, but i don't see any reason why it shouldn't work . You have to modify a system file of android, not a Sony one, so should be the same.
Of course if you didn't experience the bug, don't try this guide
but i think 0.58 hasn't a bug fix, like all 4.xxxx builds
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