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README.md

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+# Call Detail Records
+
+## Dataset Description
+
+Comprehensive logs of voice calls, SMS, and data usage across Nigerian telecom networks
+
+## Dataset Information
+
+- **Category**: Network Performance and Operations
+- **Format**: CSV, Parquet
+- **Rows**: 1,000,000
+- **Columns**: 13
+- **Date Generated**: 2025-10-05
+- **Location**: `data/call_detail_records/`
+
+## Schema
+
+| Column | Type | Sample Values |
+|--------|------|---------------|
+| `cdr_id` | String | CDR00000001 |
+| `timestamp` | Datetime | 2025-09-12 01:47:41 |
+| `operator` | String | Airtel |
+| `calling_number` | String | +2349078978178 |
+| `called_number` | String | +2348057135387 |
+| `call_type` | String | data |
+| `duration_seconds` | Integer | 0 |
+| `data_volume_mb` | Float | 69.63 |
+| `sms_count` | Integer | 0 |
+| `tower_id` | String | LAG-8972 |
+| `city` | String | Lagos |
+| `network_type` | String | 4G |
+| `call_status` | String | completed |
+
+## Sample Data
+
+```
+     cdr_id           timestamp operator calling_number  called_number call_type  duration_seconds  data_volume_mb  sms_count tower_id       city network_type call_status
+CDR00000001 2025-09-12 01:47:41   Airtel +2349078978178 +2348057135387      data                 0           69.63          0 LAG-8972      Lagos           4G   completed
+CDR00000002 2025-09-14 13:49:36      MTN +2348133004465 +2347035891260      data                 0          342.29          0 WAR-7779      Warri           4G   completed
+CDR00000003 2025-09-11 14:09:43  9mobile +2348090322661 +2348127029601     voice              2897            0.00          0 BEN-3528 Benin City           3G      failed
+```
+
+## Nigerian Context
+
+This dataset incorporates authentic Nigerian telecommunications characteristics:
+
+- **Geographic Coverage**: Major Nigerian cities including Lagos, Abuja, Kano, Port Harcourt, Ibadan
+- **Operators**: MTN, Airtel, Glo, 9mobile with realistic market shares
+- **Phone Numbers**: Nigerian format (+234 prefixes)
+- **Currency**: Nigerian Naira (NGN)
+- **Time Zone**: West Africa Time (WAT, UTC+1)
+- **Network Types**: 2G, 3G, 4G, 5G distribution
+
+## File Formats
+
+### CSV
+```
+data/call_detail_records/call_detail_records.csv
+```
+
+### Parquet (Recommended)
+```
+data/call_detail_records/call_detail_records.parquet
+```
+
+## Loading the Dataset
+
+### Python (Pandas)
+```python
+import pandas as pd
+
+# Load CSV
+df = pd.read_csv('data/call_detail_records/call_detail_records.csv')
+
+# Load Parquet (recommended for large datasets)
+df = pd.read_parquet('data/call_detail_records/call_detail_records.parquet')
+```
+
+### Python (PyArrow)
+```python
+import pyarrow.parquet as pq
+
+# Load Parquet
+table = pq.read_table('data/call_detail_records/call_detail_records.parquet')
+df = table.to_pandas()
+```
+
+## License
+
+MIT License - For educational and research purposes
+
+## Citation
+
+```
+Nigerian Telecom Datasets - Call Detail Records
+Generated: 2025-10-05
+Category: Network Performance and Operations
+Rows: 1,000,000
+```
+
+## Related Datasets
+
+This dataset is part of the Nigerian Telecom Datasets collection, which includes 34 datasets covering network performance, customer behavior, financial transactions, infrastructure, geospatial data, customer experience, and emerging technologies.

call_detail_records.csv

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+size 110928871

call_detail_records.parquet

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