hello Friends,
i am using mt7621 router
my wifi signal strength is very low.
Suggest some techiques and configuration to make it more relaible.

Generic 802.11 Wireless Controller (mt7603e)   
[Signal: 0 dBm / Noise: 0 dBm]
0%    SSID: MovFi_2.O
Mode: Client
Channel: 1 (0.000 GHz)
Bitrate: 300 Mbit/s
BSSID: 00:0C:43:26:60:40
Encryption: -
Generic 802.11 Wireless Controller (mt7612e)   
[Signal: 0 dBm / Noise: 0 dBm]
0%    SSID: mt7612e
Mode: Client
Channel: 36 (0.000 GHz)
Bitrate: 400 Mbit/s
BSSID: 78:A3:51:2B:69:09
Encryption: -

Especially for mt7603e you want to use current LEDE snapshots, as mt76 (particularly for the mt7603e chipset) has seen quite a few changes over the last couple of weeks.

My router is zbt we 1326
With lede snapshots shall i build kernel version 3.10.14

The kernel will be 4.9.x.

else can i add patches for mt7603e chipset