ussd length 40 char

I am using two models of iphone (iphone 7 plus and iphone 6) and trying to make a call to ussd service. To request that service we need to dial more than 40 characters, ie:

*188*0108*0105*12357013*04128083301*700000*1234#

And then I press dial button, but it still waiting to press dial button again. Doesn´t allow make that call with that length.

The limit of digits (characters) is forty, there is a configuration to change that limit??

Thks