The Apple iPhone 4 CDMA supports 2 codecs (AAC, SBC). The Asus Zenfone Max Pro (M2) ZB631KL supports 5 codecs (aptX HD, LDAC, AAC, aptX, SBC).
| Codec | Apple iPhone 4 CDMA Details | Change |
Asus Zenfone Max Pro (M2) ZB631KL Details | Change |
|---|---|---|
| aptX LL | No | No |
| aptX HD | No | Yes |
| LDAC | No | Yes |
| AAC | Yes | Yes |
| UHQ | No | No |
| aptX | No | Yes |
| SBC | Yes | Yes |
| Bluetooth Version | 2.1 | 5.0 |
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