Bharat Sanchar Nigam [BSNL] — cdma wll phone

Address:

500035

We have bsnl cdma wll phone with ph no: [protected]. It was installed almost 8 years back when we shifted our location near asthalakshmi temple, margadarshi colony, road-5, kothapet as a replacement for a wired landline. We are facing the following issues with the wll phone:
1. The battery does not stay longer we need to keep charging 24/7.
2. The call gets disconnected when picking up the call.
I have complained about it to our nearest bsnl office at lb nagar but no use, they are not replacing the phone.
Kindly replace the phone or give a wired landline instead of this.