New answers tagged calls
Instructions : List item Enter Engineering Mode – Dial *#*#3646633#*#* Go to Hardware Testing → Audio → Normal Mode. Select “Sph” in type. Select “level 6″ in Level. Enter 160 in value. Press Set. Restart the phone. It will increase your device's volume when you put your volume to the highest level. If you want to increase your volume ...
You might want to buy this phone. http://www.amazon.com/Panasonic-KX-PRW130W-dect_6-0-1-Handset-Telephone/dp/B00ISKW1J2/ref=sr_1_1?s=electronics&ie=UTF8&qid=1433663228&sr=1-1&keywords=KX-PRW130W
Instead of trying merge there is an alternate option. save digit '3' in contact with an easy access name like A , AA or AAA Make call one your through to the call dial the second number(add call) When second number starts ringing, go to phone book(contacts) select earlier saved contact (3) make call, that's it you are in conference with both the callers.
Unfortunately a limitation in 3g is that data cannot be used whilst a voice call is happening. Android turns off the hotspot because data isn't available during the call, so unfortunately there is no fix available until networks start to implement voice over LTE.
You may need to look for a third party app like this one: Voxeet Conferencing (the one not based on regular phone call are the more versatile)
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