The Celkon A21 supports 1 codec (SBC). The Xiaomi Redmi Note 5 AI Dual Camera supports 5 codecs (aptX HD, LDAC, AAC, aptX, SBC).
| Codec | Celkon A21 Details | Change |
Xiaomi Redmi Note 5 AI Dual Camera Details | Change |
|---|---|---|
| aptX LL | No | No |
| aptX HD | No | Yes |
| LDAC | No | Yes |
| AAC | No | Yes |
| UHQ | No | No |
| aptX | No | Yes |
| SBC | Yes | Yes |
| Bluetooth Version | 4.0 | 5.0 |
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