Thanks to everybody for their suggestions. I have been away for a few days but have been able to try some things and can answer some of your questions

Quote Originally Posted by Boki_Srb View Post
There are two possible problems in that case:
- bad map (not precisely done)
Maps are ok, I copied them onto another older phone and there Primo works fine

Quote Originally Posted by Boki_Srb View Post
- bad GPS receiver
Just to be sure, try it with another program to navigate(Sygic, Navigon, Here...), with a map of your country only, to see how it will behave.
I downloaded the HERE app to try, it is also slow to calculate speeed so maybe a bad GPS receiver?

Quote Originally Posted by wojpen View Post
k1w1 - download it from this post- [Only registered and activated users can see links. ]
Before you start installations read exactly what and how, but besides very carefully, clear the phone - how? it is written,tu:[Only registered and activated users can see links. ]
Check to make sure you do not have an extra folder somewhere igo? if so, delete, or rename.
Delete in phone all old's files and folders igo/old instalations files and folders/!!!
I have now tried 483387, 468978, 431282, 331894 and 281004. Every time I cleaned the phone accordimg to Brown Dog's instructions. Also looked for and deleted any old extra files and folders every time.

Quote Originally Posted by wojpen View Post
install at the beginning of internal memory. phone.
it will be OK.
I have tried on internal memory and external SDcard always with the same result.

Quote Originally Posted by wojpen View Post
what's your android?
Telephone root or no?
Android 4.3 Jelly Bean, not rooted

Quote Originally Posted by Boki_Srb View Post
Mr k1w1_123, do you only have problems with voice guidance or there are discrepancies and the display position?
The display position can be 200 0r 300 metres behind at 100 km/hr but is OK at slow speed in towns and villages

Quote Originally Posted by Boki_Srb View Post
What Android do you have
Android 4.3 Jelly Bean, not rooted

Quote Originally Posted by Boki_Srb View Post
what is the condition of the system on the phone?
Phone was factory reset 2 or 3 weeks ago before first installing Primo

Quote Originally Posted by Boki_Srb View Post
If it is not an electronic problem (easy to check with other software)
Do you know of a software I could use to check for electronic problems?

Quote Originally Posted by Boki_Srb View Post
And put a fresh installation with the most basic necessary files.
when I test different Primo versions I use only the map for my country


Mr Boki_Srb, I think your idea to try a different programme was a good one; Trying the HERE app has shown me the problem is with my phone and not with Primo. If you know of a program I can use to check the phone for problems please let me know.

Thank-you again to all who have contributed to this thread.