Difference between revisions of "FAQ"

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Here are a list of some frequently asked questions:

Here are a list of some frequently asked questions:

There are many networks in different countries and multiple technologies they use within that network. The site allows you to dig into these in detail.  The providers are selected by a country code (MCC) and network code (MNC).  The MCC code to country mapping is defined by the International Telecommuncations Union, while the MNC is defined by each country on their own.

There are many networks in different countries and multiple technologies they use within that network. The site allows you to dig into these in detail.  The providers are selected by a country code (MCC) and network code (MNC).  The MCC code to country mapping is defined by the International Telecommuncations Union, while the MNC is defined by each country on their own.

Tower locations are based purely on calculations.  The reason that towers will show up over water is due to the fact that water usually doesn't contain any object that can block signals.

Tower locations are based purely on calculations.  The reason that towers will show up over water is due to the fact that water usually doesn't contain any object that can block signals.

So, to the algorithm, sitting in a building right beside a cell phone tower will appear to be the same as being 5 km away with direct line of sight.  Hence, it will calculate an average of the two spots

So, to the algorithm, sitting in a building right beside a cell phone tower will appear to be the same as being 5 km away with direct line of sight.  Hence, it will calculate an average of the two spots

Currently, LTE is the most accurately mapped technology due to using RSRP instead of RSSI.

Currently, LTE is the most accurately mapped technology due to using RSRP instead of RSSI.

Unfortunately, not much can be done about this.  Most phones will report the same Cell ID when a call is in progress.  Likewise, some phones will get "stuck" to reporting a

Unfortunately, not much can be done about this.  Most phones will report the same Cell ID when a call is in progress.  Likewise, some phones will get "stuck" to reporting a

single cell id for a certain length of time.  Another possibility is that the GPS device is incorrectly reporting the position; and as a result the location may keep changing wildly before it settles

single cell id for a certain length of time.  Another possibility is that the GPS device is incorrectly reporting the position; and as a result the location may keep changing wildly before it settles

While the app and site try to filter this bad data, there is not much that can be done to fix it.  As more data is gathered, these errors will slowly decrease until the map becomes more and more accurate.

While the app and site try to filter this bad data, there is not much that can be done to fix it.  As more data is gathered, these errors will slowly decrease until the map becomes more and more accurate.

The frequency can only be retrieved with a BlackBerry device for certain.  Certain Windows Mobile devices (Qualcomm based HTC devices) and all Windows Phone 10 device also support this.  For Android, certain Motorola MotoBlur devices (Motorola Charm) support this; as well as most Android 7.0 or higher devices.

The frequency can only be retrieved with a BlackBerry device for certain.  Certain Windows Mobile devices (Qualcomm based HTC devices) and all Windows Phone 10 device also support this.  For Android, certain Motorola MotoBlur devices (Motorola Charm) support this; as well as most Android 7.0 or higher devices.

It may take anywhere from a few minutes to a few days, and up to a week, for data to be generated.

It may take anywhere from a few minutes to a few days, and up to a week, for data to be generated.

Low accuracy towers are towers whose location cannot be accurately predicted given the uploaded data.  Therefore, they revert to a more simple algorithm of placing the tower

Low accuracy towers are towers whose location cannot be accurately predicted given the uploaded data.  Therefore, they revert to a more simple algorithm of placing the tower

closest to the location of the best signal strength.  This will usually be significantly less accurate than the triangulation method normally used.  Some towers that only have 1 or two cells,

closest to the location of the best signal strength.  This will usually be significantly less accurate than the triangulation method normally used.  Some towers that only have 1 or two cells,

such as omnidirectional towers, will always be low accuracy.  Likewise, any towers which were detected with weaker signals will also be low accuracy until stronger signal samples are uploaded.

such as omnidirectional towers, will always be low accuracy.  Likewise, any towers which were detected with weaker signals will also be low accuracy until stronger signal samples are uploaded.

Some networks have a known sector number to frequency band mapping.  If it is known, it will be displayed on the site.  If you know the mapping for a certain provider, please let us know so that we can include it.

Some networks have a known sector number to frequency band mapping.  If it is known, it will be displayed on the site.  If you know the mapping for a certain provider, please let us know so that we can include it.

In Android 4.2, the CellID API was re-written to ensure data is updated somewhat atomically to avoid bad data.  Unforunately, some manufacturers, notably Samsung, have chosen not to implement this new API.  You can see a list of known supported and unsupported devices on this page: [[Android_4.2_CellID_Support]] or [[Tested Phones]]

In Android 4.2, the CellID API was re-written to ensure data is updated somewhat atomically to avoid bad data.  Unforunately, some manufacturers, notably Samsung, have chosen not to implement this new API.  You can see a list of known supported and unsupported devices on this page: [[Android_4.2_CellID_Support]] or [[Tested Phones]]

When you record CDMA network or have "keep screen turn on" feature, screen won't turn off.

When you record CDMA network or have "keep screen turn on" feature, screen won't turn off.

Yes, it does support certain dual-SIM phones.  See [[Tested_Phones]] for details.

Yes, it does support certain dual-SIM phones.  See [[Tested_Phones]] for details.

Apple doesn't allow apps to use the network info API.

Apple doesn't allow apps to use the network info API.

Yes, please add it to [https://github.com/CellMapper/CellMapper-Android-App/issues App] or [https://github.com/CellMapper/Cellmapper-Site/issues Website] issue tracker or email us

Yes, please add it to [https://github.com/CellMapper/CellMapper-Android-App/issues App] or [https://github.com/CellMapper/Cellmapper-Site/issues Website] issue tracker or email us

Since we use different applications for different parts of the site, you will need to register separately for the wiki and website.

Since we use different applications for different parts of the site, you will need to register separately for the wiki and website.

Unfortunately, due to heavy spam, you will need to ask someone for permission to register.

Unfortunately, due to heavy spam, you will need to ask someone for permission to register.

Yes, please see [http://www.cellmapper.net/help/ this link] for a full manual.

Yes, please see [http://www.cellmapper.net/help/ this link] for a full manual.

Generally, generic Qualcomm based phones are best.  See the [[Tested_Phones]] page for details.

Generally, generic Qualcomm based phones are best.  See the [[Tested_Phones]] page for details.

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