There are few different things that can cause this issue and we will list them here below with the most common causes listed first.

1. You might need set your microphone device
    as default in your Windows audio control panel.
 

2. Microphone boost might need to be enabled or disabled.
   
    For an example if the person you are calling can hear you very low,
    you might need to enable microphone boost.

    On the other hand on some sound cards, having microphone boost
    enabled can cause distortion because of too high volume level of the
    microphone device and will then needed to be disabled.

You can click on the links provided here below to see instructions on how to set your audio device as default in windows audio control panel or to enable or disable microphone boost on your microphone:

Windows Vista & Windows 2007: Click here for instructions
Windows XP (Classic Style): Click here for instructions
Windows XP (XP Style): Click here for instructions

3. This problem might also be solved by simply adjusting volume.
    Too high microphone settings can cause distortion to the person
    you are calling and cause extra feedback affecting voice quality.

    If you are using built-in speakers and microphone on a PC laptop,
    you should have your speaker volume as low as possible.
    With speaker volume set too high the person you will call,
    will hear extra feedback from your speakers and this can cause
    echo and other problems having affect on voice quality.

4. There is also always a possibility that the microphone device
    a customer is using is of low quality or simply not working.

    One of the most important thing to experience good voice
    quality using PC-to-Phone software is to have a good audio
    device to make calls and that sound card is working properly.

    Regular computer handsets/headsets are connected to the
    PC sound card and normally work very well as long as the
    handset/headset/sound card are in good working order.

    Sometime it can be hard for users to troubleshoot such audio
    problems and he/she might for example purchase another
    regular computer handset/headset without solving the problem.

    If the sound card on the PC has problems, it will not make any
    difference to use another headset/handset with the sound card.

    The best audio device to use with PC-to-Phone are USB
    handsets/headsets and they are especially designed for
    Internet voice communication for optimum voice quality.

    Another advantage of using USB audio devices is that they will
    bypass the PC sound card and therefore it will not matter if
    there are some problems with the sound card on the PC.

    USB audio devices are very simply to connect to any PC
    (plug & play to any USB port on your computer).

5. It's important when installing our PC-to-Phone software that
    you will click on "Allow" or "Yes" if any firewall or security
    program will ask during installation to allow our software.

    Otherwise such programs might prevent your voice to be
    transmitted over the Internet when using our software and
    will probably also cause software registration problems.

    In most cases for customers affected by such problems,
    it will solve the problem to simply uninstall our software
    and then download and install our software again.
    You can download our main PC software version here.

If you have been using our services for some time and
suddenly start facing this problem it's very likely caused
by temporary Internet problems with your Internet Service Provider.

This could also possibly be caused by temporary problem with our
registration servers, however our service uptime is over 99% and
very unlikely this would be the cause for this support issue.

If you suddenly start having registration problems,
it will in many cases solve such problems to simply restart
your PC and also your Internet router at the same time.
 

If you are a new NetTelePhone user and our software does
not register normally for you, please see suggestions here below:

1. Make sure that you have inserted correct Account and
    Pin number (Account: 12 digits - Pin: 6 digits).
    To re-enter your NetTelePhone calling account and pin number,
    you can click on the "Account Setup" link on our software.

2. If you are sure that you have inserted the correct account
    and pin information and the software still does not register,
    please try the following suggestions listed here below:

    a) Restart your PC and Internet router.

    b) If this does not solve your problem, uninstall our software
        and download and install our software again here.
        Make sure during installation that you will select "Allow" or "Yes",
        if asked by security of firewall programs to allow our PC-to-Phone
        software Internet access on your computer.

        Our PC-to-Phone software does not have any spyware program
        and is totally safe for our customers to use to place Internet calls.

3. Our PC-to-Phone software is compatible with all major
    Internet security, firewall and anti-virus programs.

    However it's possible that some customers might be using Internet
    security software that will not ask for permission to allow Internet
    access of our software during the software installation process.

    In such cases our PC-to-Phone software users might have to manually
    configure their Internet security or anti-virus program to allow our
    software access to the Internet to make Internet calls.

4. In some instances it will work better for our customers to use our
    alternative software solution to overcome firewall related problems.

     Click here to see and alternative PC-to-Phone software solution.
 

Make sure that you are dialing the phone number correctly.

You will need to include country code and like with all international phone services, if a phone number will start with "0", skip the zero.

For example to call a phone number 0123456789 in the United Kingdom
(country code for UK is 44), you would dial 4412345679.

You can see list of international country codes here.

In some cases it's possible that you will see "Disconnected" message
on the software display screen, when calling phone numbers that are
busy or mobile phones that are turned off.

We only use top quality and reliable voice carriers to route our
VoIP calls, but it could be possible that some calls would not connect
because of a temporary problem to a certain calling destination.

If you have a problem connecting to a certain phone number and are
sure that the phone number is not busy or turned off, then you can
try to make calls using prefix of 02 or 03 before the country code.

Using these prefixes will route calls differently on our VoIP network.
Please click here to see more information on using 02/03 prefixes.

The most common reason for customers having problems with
recharging their calling account is because of they will need to
update their credit/debit card or contact information with us.

This could for example be because of new expiry date on card used
to purchase our services before or a customer has a new credit card.

To update your information you can go to our secure order page:
https://www.nettelephone.info/secure-purchase.html

On the bottom of the secure order page you will have an option of
inserting your NetTelePhone calling account number to be recharged.

Your calling account will then be recharged and at the same time your
new contact and payment information will be updated in our database.

With a valid credit/debit card and contact information updated in our
database, you can use our fast response recharge forms to request
a recharge to your calling account by simply providing your account number and email address and then your NetTelePhone calling account
will be recharged using your credit/debit card on file with us.

Many of our customers are also using PayPal to recharge their accounts.
You can click here to use PayPal to pay for our VoIP services.

You can send a request from an email address that is registered with
our VoIP services to: support@nettelephone.com and simply put
"Please send my Account & Pin" in subject of the email.

To insert a new Account & Pin number on our software interface,
you simply click on the "Account Setup" button.

You can click here to see a short demonstration video.

You can click on the "Recharge Order" link on our software interface.

Please click here to see a short demonstration video on how to recharge
your NetTelePhone calling account from our PC-to-Phone interface.

If you are using a SIP device or other options with our VoIP services,
then you can click here to go directly to our recharge request page.

To record your phone calls using our PC-to-Phone software, you simply click on the "Record" button on the software, after your call connects.

You can for example record only part of the phone call and then you
would simply click on the "Record" button again to stop recording.

You can click here to see a short demonstration video on how to
record your calls and locate your recorded files on your PC.

Our PC-to-Phone software is very user friendly and very simple to use,
to place your international calls from any country in the world.

We recommend for new users click here to see a short demonstration
video on how to make calls with our PC-to-Phone software.

Using both our PC-to-Phone & Mobile Phone software's, you will
see your calling account balance displayed on the display screen.

The account balance will be updated after each of your calls.

If you are using a SIP device or third party software with our VoIP
Services, you can dial *11 to hear your calling account balance.

You can configure SIP devices using our SIP Proxy Server Address: 78.40.240.178 along with your NetTelePhone Account & Pin number.

However if you are using SIP devices from countries where VoIP blocking is in affect, some additional configuration is needed.

You can click here to see instructions on how to configure SIP devices to our VoIP network in blocked VoIP regions (e.g.: Oman & UAE).

This is a very rare complaint from our customers and our software
is in majority of cases displaying normally on all Windows PC's.

However for the few customers that are facing this issue,

using an alternative software solution has solved this problem.

Please click here to see information on using another software solution
to make calls with a NetTelePhone VoIP calling account.

If you are having this problem please look at the topics listed here above previously and see if this will help you solve your problems.

Our company has been in the VoIP industry longer than most other
VoIP services (over 12 years) and we have a long experience dealing with customer support VoIP issues and related matters.

In most cases that customers are having problems with voice quality
calling from their PC, is related to audio device on the computer used.

However this can also be caused by other issues like slow PC CPU speed,
lack of computer memory or many other issues too long to list here.

If you have problems using our PC-to-Phone software and our support instructions will not help you solve your problems, you might consider
trying our PC-to-Phone software on another computer.

We also highly recommend to our customers to look at using our mobile
phone software to place their international phone calls.

The cost is exactly the same as using our PC-to-Phone software,
however quality will not be affected by any computer problems and
and you will have the convenience using your mobile phone to make calls through our high quality VoIP network.

Click here for more information using our Mobile Phone Software.

The first thing you have to check if your mobile phone is compatible
to use with our mobile phone software and you can see this by
clicking here to view currently compatible mobile phone handsets.

If your mobile phone handset is compatible, you will also need to
be able to access the Internet with your mobile phone either by
Wi-Fi, 3G or GPRS Internet connections on your mobile phone.

Using mobile phone software making calls using VoIP is a very new
technology and we have noticed that some customers or new users
are not understanding exactly how it works to use this service option.

We are working on making better instructions for our mobile software.

Here below we list three simple steps to check if your mobile phone handset is compatible and can be used with our mobile phone software.

1. Click here to see if your mobile phone is supported
    (we are working on adding compatibility of more mobile phones).

2. If you see that your mobile phone is compatible, you also have to
    make sure that you can access the Internet with your mobile phone.

    For example you can test if you are able to go to: www.google.com
    with your mobile phone and access the Internet.

3. In steps 1 & 2 mentioned here above, if you both see that your
    mobile phone is compatible to use with our mobile phone software
    and you are able to access the Internet with your mobile phone,
    then you go to this link using your mobile phone Internet browser:
    http://get.mobile111.com for the download and installations process.

    The download and installation process is quite straight forward.
    Please click here for further instructions.

    You can also click here to see more  information about using our
    mobile phone software to place your international calls.

Our technical engineers are working on making our mobile phone software compatible with Blackberry and other mobile phone brands.

You can contact us at support@nettelephone.com, if you want to be informed when our mobile software will be compatible with your mobile.

Please include your mobile manufacturer and model type.

Our PC-to-Phone software's don't currently support Macintosh or Linux.

However it's possible to use the free X-Lite software and configure that software to use with our VoIP services on Macintosh and Linux.

In the configuration window of the X-Lite software, you will need to insert your calling account and our SIP Address: 78.40.240.178

Click here to view X-Lite configuration example.

Note: If you are located in a country that is applying active VoIP blocking, like Oman, Qatar and UAE it will not work to use the X-Lite software with Macintosh and Linux operating systems.

Click here to see X-Lite software download information.

Yes you can.

Please click here for more information.