A method comprising: executing data processing hardware of user equipment, UE, in a doze mode, a peek mode, and a normal mode, wherein the doze mode comprises: terminating any connections with a network; comparing a clock time of the data processing hardware with a maintenance window schedule of maintenance time windows; and when the clock time is within a maintenance time window of the maintenance window schedule, executing the peek mode, notifying a mobility management entity, MME, system about executing the doze mode, comprising executing an over-the-top, OTT, application to deliver an out-of-band message to the MME system about executing the doze mode, before instructing the transceiver to enter an idle state, wherein the peek mode comprises: receiving a connection request from the MME system when the MME system has been notified of at least one buffered downlink packet addressed to the UE device; and in response to receiving the connection request, executing the normal mode, and wherein the normal mode comprises: establishing a connection to the network; receiving the at least one buffered downlink packet; and when the at least one buffered downlink packet has been received and the maintenance time window has lapsed, executing the doze mode; wherein the data processing hardware is in communication with a transceiver having a connected state and the idle state, and terminating any connections with the network during the doze mode comprises instructing the transceiver to enter the idle state, ceasing any communication operations. executing data processing hardware of user equipment, UE, in a doze mode, a peek mode, and a normal mode, wherein the doze mode comprises: terminating any connections with a network; comparing a clock time of the data processing hardware with a maintenance window schedule of maintenance time windows; and when the clock time is within a maintenance time window of the maintenance window schedule, executing the peek mode, notifying a mobility management entity, MME, system about executing the doze mode, comprising executing an over-the-top, OTT, application to deliver an out-of-band message to the MME system about executing the doze mode, before instructing the transceiver to enter an idle state, terminating any connections with a network; comparing a clock time of the data processing hardware with a maintenance window schedule of maintenance time windows; and when the clock time is within a maintenance time window of the maintenance window schedule, executing the peek mode, notifying a mobility management entity, MME, system about executing the doze mode, comprising executing an over-the-top, OTT, application to deliver an out-of-band message to the MME system about executing the doze mode, before instructing the transceiver to enter an idle state, wherein the peek mode comprises: receiving a connection request from the MME system when the MME system has been notified of at least one buffered downlink packet addressed to the UE device; and in response to receiving the connection request, executing the normal mode, and receiving a connection request from the MME system when the MME system has been notified of at least one buffered downlink packet addressed to the UE device; and in response to receiving the connection request, executing the normal mode, and wherein the normal mode comprises: establishing a connection to the network; receiving the at least one buffered downlink packet; and when the at least one buffered downlink packet has been received and the maintenance time window has lapsed, executing the doze mode; establishing a connection to the network; receiving the at least one buffered downlink packet; and when the at least one buffered downlink packet has been received and the maintenance time window has lapsed, executing the doze mode; wherein the data processing hardware is in communication with a transceiver having a connected state and the idle state, and terminating any connections with the network during the doze mode comprises instructing the transceiver to enter the idle state, ceasing any communication operations.