The situation has changed a little bit. If I try to load a map via mobile internet, it succeeds say 1 out of 5 attempts. So, in principle it works, although not reliable.
Hallo kustg,
Thanks for your reply. Unfortunately, changing the URL string as you suggested does not improve the situation. Note that the old string works well when using normal internet (WiFi).
Hallo Martin,
Your reply was very informative, thanks. Every time I make a data connection I get a different internet address. Is this an indication that the address I get is not shared with many other users?
Also, if the limit is the problem, then it is strange that the request for a map sometimes succeeds after a few seconds when trying again. You would expect that waiting for a new day was necessary. Moreover passing the limit should result in a kind of icon in the map area, according to the API documentation.
I noticed also that the strength of the signal does not make difference. Sometimes the request is honoured with a weak signal and refused with a strong signal.
Anyhow, it is strange that something which is forbidden now, it allowed some seconds later.
I will further investigate the problem with the Google Maps discussion groups.
Harry