CellInfoExtractor.kt

fun getCurrentCellInfo(context: Context): List<CellInfo> {
    val telephonyManager = context.getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager
    val allCellInfo = telephonyManager.allCellInfo

    return allCellInfo.mapNotNull {
        when (it) {
            is CellInfoGsm -> getCellInfo(it)
            is CellInfoWcdma -> getCellInfo(it)
            is CellInfoLte -> getCellInfo(it)
            else -> null
        }
    }
}