I am not sure you may have VHF capabilities with BV 9500 pro
The walkie talkie section  is  designed for UHF frequency beetween 400-470 MHz  Analog or Digital modes.
No way to reach 156 MHz frequency.... !
Hope will help !

I'm still not convinced that the hardware itself isn't the same as many dual-band radios from China, that all can do 136-174 and 400-(470, 480, or 520) MHz. I think all that would really be necessary is the right access to the right files/hardware character devices and drivers, but of course not having any way to directly speak with the developers/engineers of the BV9500 Pro at all, there's no way to know for sure.

We do know that other phone[ brand]s have VHF capability, and the instruction manual included with this phone is generic and agnostic of actual phone model purchased, so it's probably the same manual included with every walkie-talkie phone regardless of frequencies supported. While I wouldn't know for sure, it wouldn't be surprising to discover the Ulefone Armour 3T used the same manual (we've seen that it uses the same "Intercom" app in its promotional videos). We also know that the support team at Blackview have no clue whatsoever about operation of the radio beyond simple walkie talkies because even though the instructions clearly mention repeater operation, if you complain to them that the radio has a glitch and mention that the transmit and receive frequencies are different, they'll send you instructions and make videos to try to convince you that your problem is because the transmit and receive frequencies are different even though they have nothing to do with the problem. Further supporting this opinion, they also don't understand CTCSS or what it's used for. So, there's a definite disconnect between the engineers/developers who make the hardware designs and the support team who deal with the users.

If the radio hardware is in fact capable of VHF, you'll never get it from BV. It will require custom development from a third party (hacker/custom ROM developer). Plus, even if it were capable of VHF and they provided a ROM update to enable that, they'd then have to have included a dual-band antenna with the phone to keep SWR acceptable, which would add (admittedly negligible) cost to the device.

I remember wondering from the beginning of VHF were a possibility, but I never saw any advertisement anywhere that explicitly stated the BV9500 Pro was anything other than UHF, especially from BV. If you need a cheap VHF transceiver, depending on the radio communications laws of your country, you might look into the Baofengs. I just ordered a UV-B5 on eBay for US$28 minus a US$5 promo deal that eBay is running (so $23 with free shipping). YouTube videos I've watched recently, tough, imply that the UV-5R might have better audio. The UV-82 (some variants at least) has higher output power.

Sorry for the slight off-topic but it's pertinent to the subject matter of the OP.

Can an antenna be installed on be 9500 plus. I cannot open the antenna space.

Regards

mbenven wrote:

Can an antenna be installed on be 9500 plus.  I cannot open the antenna space.

Regards

BV9500plus does not support hard intercom, no antenna。