Help i need ussd codes

Hey Sasha, welcome here! I understand you're not satisfied with the speeds you're getting on your phone. There's a few questions I'd like to ask you to determine if, and then what, can be done to do so.

• Do you have a contract with us, or do you use prepaid?
• Are you in an area with adequate mobile reception?

Please also fill in your profile with the mobile number (field 'klantnummer mobiel'), postal code (field 'postcode') and house numnber (field 'huisnummer').