I have been using a2 lite for quite sometimes now. But for a few months, im having call quality issues. Everytime i call someone or get a call from someone, I can hear them loud and clear, but they arent able to hear me clearly. This is never happend to me while I use whatsapp to call someone, only happens when I use GSM calls. Please fix this issue. My friend bought the same variant and also having this issues.