Section 4B: Terms & Conditions / Warranty 184additional data used in accessing, transporting and routing this information/itemon our network, data from partial or interrupted downloads, re-sent data, and dataassociated with unsuccessful attempts to reach websites or use applications.Based on these and a number of other factors (e.g., the specific application,network performance, etc.) data used and charged to you will vary widely, evenfor the same activity. Estimates of data usage – for example, the size ofdownloadable files – will not be accurate or a reliable predictor of actual usage.Your invoice will not separately identify the number of kilobytes attributable toyour use of specific sites, sessions or services.Taxes and Surcharges. We invoice you for taxes, fees and other charges levied byor remitted directly to federal, state, local or foreign governments including,without limitation, sales, gross receipts, Universal Service, use, and excise taxes. Ifyou claim any tax exemption, you must provide us with a valid tax-exemptdocument. Tax exemptions are not applied retroactively. We also invoice you forsurcharges that we collect and keep to pay for the costs of complying withgovernment programs such as number pooling and portability, and Enhanced 911service; these charges are not the taxes nor government imposed assessments.Invoicing & Payment. Invoicing cycles and dates may change from time to time.Monthly recurring and related charges for Services are generally invoiced oneinvoicing cycle in advance. Other charges are invoiced soon after they areincurred. Most usage is generally applied to the invoicing cycle in which they areincurred, but in some instances may be applied to subsequent invoicing cycles.You are responsible for all charges associated with any device activated on youraccount, regardless of who used the device. You must pay all charges by the duedate on the invoice. Past due amounts accrue late charges until paid at the rate of 5%per month or at the highest rate allowed by law and may result in immediate suspensionof your account. If you agree to any auto-payment option through banking or creditaccount, we may initiate payment from the account for all amounts we invoiceyou without additional authorization or notice. Based on your credit or paymenthistory, we may require certain forms of guaranteed payment as a condition ofmaintaining Services. If we invoice you for amounts on behalf of a third-party,payments received are first applied to amounts due to us. You may be chargedadditional fees for certain methods of payment and for payments denied by afinancial institution. Acceptance of payments (even if marked “paid in full”) doesnot waive our right to collect all amounts that you owe us.Disputed Charges. Disputes concerning any charges invoiced must be raisedwithin 60 days of the date of the invoice. You accept all charges not disputed inthis time period. Disputes can only be made by calling or writing us as directed onyour invoice.Account Spending Limit & Deposits. We may impose an account spending limit(“ASL”) on any account without notice. We will notify you of an ASL based on yourcredit or payment history and may reduce the ASL at any time with prior notice.An ASL should not be relied on to manage usage on your account. We maysuspend an account without prior notice when the account balance reaches theASL, even if the account is not past due. Services can be restored upon payment of